Recent Topics
5/32 enough for Winter?
by SumpChump
10/31/14 11:52 PM
Noise from front wheel area
by weebl
10/31/14 11:31 PM
Need advice.
by joyridin83
10/31/14 11:06 PM
Amsoil SVG or Valvoline synpower 75w90
by donnyj08
10/31/14 10:54 PM
Kia oil control valve
by Propflux01
10/31/14 10:16 PM
Avalanche power steering cooler
by spasm3
10/31/14 09:58 PM
Sharp 42" LED 1080p/120Hz - $299
by mrsilv04
10/31/14 09:50 PM
brake squeak left turn.
by wrcsixeight
10/31/14 09:40 PM
Sgt. Tamoressi released
by FL_Rob
10/31/14 09:09 PM
Castrol Magnatec PDS.
by HappyLittlePony
10/31/14 08:29 PM
snowblower 5w20 wt oil
by subaroo
10/31/14 08:02 PM
Duralube
by bobbob
10/31/14 07:07 PM
Newest Members
joyridin83, NH73, Blkflg, steam_soldier, Ben_SC
51763 Registered Users
Who's Online
51 registered (340_Magnum, Bandito440, Analyzer, 901Memphis, abycat, 3 invisible), 743 Guests and 167 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51763 Members
64 Forums
221498 Topics
3502721 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG

Page 1 of 4 1 2 3 4 >
Topic Options
#3246744 - 01/13/14 09:54 AM Running 0W-40 where 5W-30 is specified
novadude Offline


Registered: 01/16/03
Posts: 1351
Loc: mechanicsburg, PA
Vehicle is a Chevy Colorado - 3.5L I-5, 147k miles. I really like the looks of the M1 0W-40. Seems to be one great oil at a Wal-Mart 5-qt jug M1 price. I've been thinking about buying this instead of my usual M1 5W-30 for my next OCI. Vehicle has always shown slightly elevated fuel in UOAs since new, so I am thinking that the higher vis will likely be knocked down by fuel after a few 1000 miles anyway. Can anyone think of any good reason NOT to run 0W-40? I'm having a hard time coming up with any "downside". M1 0W-40 looks to be almost at a "heavy 30wt" vis range. My thought is that any impact on fuel economy will be so small that it will be insignifcant.

Top
#3246749 - 01/13/14 09:58 AM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
stenerson Offline


Registered: 08/26/09
Posts: 651
Loc: NH
I definitely wouldn't worry about fuel economy which I believe would be insignificant. Wether there's any real advantage I can't comment.
_________________________
2004 Dodge 1500 4x4 5.7 Hemi 206k miles
2005 suburu outback 137K

Top
#3246754 - 01/13/14 10:01 AM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
lexus114 Offline


Registered: 05/12/08
Posts: 6017
Loc: Easton, PA
Maybe slight decrease in fuel millage and power. When I ran GC in my RX the fuel millage was better. But it was a little sluggish.
_________________________
2012 Mercedes-Benz C300 4matic
2015 Lexus RX350 AWD

Top
#3246896 - 01/13/14 12:18 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
Maxima97 Offline


Registered: 02/11/12
Posts: 322
Loc: WA - Washington
0W40 instead of 5W30. What's the benefit? If you don't tow a trailer with your truck. However, I see you live in mountain area in PA, then you would probably work the truck harder so use thick oil to increase oil pressure might be a benefit. For clean engine, just use the regular PYB or any name brand 5W30 and do 5k OCI.
_________________________
97 Maxima, Maxlife 5W30
99 LX470,PU 5W30
98 Explorer,PU 5W30
93 Prizm, PU 5W30
01 Camry,G oil 5W30
95 Villager,Maxlife 5W30
05 Accord,Idemitsu 0W20

Top
#3246937 - 01/13/14 12:44 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
There would be no advantages just disadvantages to running M1 0W-40 vs say a synthetic in the specified 5W-30 grade.
M1 0W-40 will simply be much heavier than necessary under all conditions.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3246977 - 01/13/14 01:25 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
Maxima97 Offline


Registered: 02/11/12
Posts: 322
Loc: WA - Washington
You can mix a Qt of M1 0W20 with the 0W40 to make it thinner. But unless you intend to do 10K OCI, using such good synthetic oil mix is a waste. Like I said, modern SN oil is already a mix of Group III blend if you go with PYB, MotorCraft and other name brand dino. At 5K, these oil should still have plenty of life. The ideal OCI point now is 7.5 for dino and 12.5K for good synthetic oil.
_________________________
97 Maxima, Maxlife 5W30
99 LX470,PU 5W30
98 Explorer,PU 5W30
93 Prizm, PU 5W30
01 Camry,G oil 5W30
95 Villager,Maxlife 5W30
05 Accord,Idemitsu 0W20

Top
#3247014 - 01/13/14 01:52 PM Re: Running 0W-40 where 5W-30 is specified [Re: Maxima97]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
Originally Posted By: Maxima97
You can mix a Qt of M1 0W20 with the 0W40 to make it thinner. But unless you intend to do 10K OCI, using such good synthetic oil mix is a waste.

I don't know why you would describe your suggested blend as a "waste". It's actually a good idea is you want to make a higher VI 0W-30 than what you can buy although you'll have to use a lot more than just one quart of M1 0W-20, more like 60%.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247033 - 01/13/14 02:07 PM Re: Running 0W-40 where 5W-30 is specified [Re: CATERHAM]
nepadriver Offline


Registered: 07/20/11
Posts: 215
Loc: Northeast PA
Originally Posted By: CATERHAM
Originally Posted By: Maxima97
You can mix a Qt of M1 0W20 with the 0W40 to make it thinner. But unless you intend to do 10K OCI, using such good synthetic oil mix is a waste.

I don't know why you would describe your suggested blend as a "waste". It's actually a good idea is you want to make a higher VI 0W-30 than what you can buy although you'll have to use a lot more than just one quart of M1 0W-20, more like 60%.


Is there a thread that breaks down that mix ratio you could link to?

Also, in a towing scenario wouldn't the 0w40 be fine, or very hot climate, or both, if the owners manual specifies it as such?

Top
#3247052 - 01/13/14 02:19 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
Maxima97 Offline


Registered: 02/11/12
Posts: 322
Loc: WA - Washington
How do you know you will get a higher VI oil by mixing oil. Suppose 0W20 and 0W40 will cost the same to oil refiner, why don't they do it AT NO COST? 0w30 oil is on the perfect spot for light weight vehicle.If cost is the factor, a 5W30 is the ideal oil for passenger vehicle and light truck. If you have a turbo charged vehicle from EU, then 0W40 is recommended. So unless you know what you will get from a mix, don't do it. The oil refiner lab already thought this for you.


Edited by Maxima97 (01/13/14 02:20 PM)
_________________________
97 Maxima, Maxlife 5W30
99 LX470,PU 5W30
98 Explorer,PU 5W30
93 Prizm, PU 5W30
01 Camry,G oil 5W30
95 Villager,Maxlife 5W30
05 Accord,Idemitsu 0W20

Top
#3247073 - 01/13/14 02:29 PM Re: Running 0W-40 where 5W-30 is specified [Re: nepadriver]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
Originally Posted By: nepadriver
Originally Posted By: CATERHAM
Originally Posted By: Maxima97
You can mix a Qt of M1 0W20 with the 0W40 to make it thinner. But unless you intend to do 10K OCI, using such good synthetic oil mix is a waste.

I don't know why you would describe your suggested blend as a "waste". It's actually a good idea is you want to make a higher VI 0W-30 than what you can buy although you'll have to use a lot more than just one quart of M1 0W-20, more like 60%.


Is there a thread that breaks down that mix ratio you could link to?

Also, in a towing scenario wouldn't the 0w40 be fine, or very hot climate, or both, if the owners manual specifies it as such?

Using a viscosity calculator like Widman's will allow you to determine the percentages of each oil to get the desired final viscosity:
http://widman.biz/English/Calculators/Mixtures.html

Yes using a 0W-40 would be of course fine if the owners manual suggests it but GM doesn't. The specified 5W-30 grade or equivalent 0W-30 with the same HTHSV has more than enough viscosity reserve to deal with the resultant higher oil temp's that may result from some extreme usage like towing in the mountains on a hot summer day.
Also oil shear and possible fuel dilution are also factored into the 30 grade oil recommendation.
Put another way, for more typical none extreme use you could very likely use a 0W-20 oil grade which many OEM's are specifying today including GM.
If one is really concerned about their oil choice not being up to the task simply choose a synthetic oil of the specified grade which will handle high oil temp's better than an off brand dino.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247078 - 01/13/14 02:31 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
mclasser Offline


Registered: 04/13/13
Posts: 378
Loc: DC
Some owners of VQ35s say Mobil 0w40 makes the car run better than any 5w30 spec'd by Nissan. I've never tried experimenting with different weights of oil personally but it is an interesting topic.
_________________________
-- 2013 Honda Pilot EX-L 4WD
-- 2002 Honda Accord EX-L SULEV: 180K miles
-- 2002 Infiniti I35: 90K miles

Top
#3247085 - 01/13/14 02:37 PM Re: Running 0W-40 where 5W-30 is specified [Re: CATERHAM]
Shannow Online   content


Registered: 12/12/02
Posts: 26887
Loc: a prison island
Originally Posted By: CATERHAM
Put another way, for more typical none extreme use you could very likely use a 0W-20 oil grade which many OEM's are specifying today including GM.


Which OEMs are specifying 20s for the Chevy I5 ?

Top
#3247091 - 01/13/14 02:44 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
Clevy Offline


Registered: 11/11/10
Posts: 7437
Loc: Saskatoon canada
Considering the m1 0w -40 is on the thin end of the 40 grade scale,and thinner at start up I can't see any reason not to use it,other than an imperceptible hit in fuel economy.
The 0w-40 grade is something special. It meets many performance engine specs as well as the euro long drain specs and so on. I am not a Mobil fan at all however that oil is the one that would have me swallow my disdain for Mobil,especially if we could get it for the 25 a jug the American walmarts stock it for.
As far as your particular application unless you are towing or really pushing the engine there may not be any real need for it however it is a world class oil and it certainly won't hurt
_________________________
2006 Charger RT
Miles x 2 per oil filter

Top
#3247092 - 01/13/14 02:44 PM Re: Running 0W-40 where 5W-30 is specified [Re: Shannow]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
I didn't say for the Chevy 15, just that GM has started specifying the 0W-20 grade for some new models.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247108 - 01/13/14 02:55 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
SHOZ Offline


Registered: 06/28/03
Posts: 1809
Loc: Illinois
I run 0w40 M1. Hit the pump bypass pressure quite a bit.

Top
#3247130 - 01/13/14 03:12 PM Re: Running 0W-40 where 5W-30 is specified [Re: SHOZ]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
Originally Posted By: SHOZ
I run 0w40 M1. Hit the pump bypass pressure quite a bit.

Exactly, which is why it's heavier than necessary for any Chevy including a track driven Corvette Z-06.
There simply isn't a scenario where anything heavier than M1 5W-30 is required for a Chevy.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247132 - 01/13/14 03:14 PM Re: Running 0W-40 where 5W-30 is specified [Re: CATERHAM]
OVERKILL Offline


Registered: 04/28/08
Posts: 26520
Loc: Ontario, Canada
Originally Posted By: CATERHAM
Originally Posted By: SHOZ
I run 0w40 M1. Hit the pump bypass pressure quite a bit.

Exactly, which is why it's heavier than necessary for any Chevy including a track driven Corvette Z-06.
There simply isn't a scenario where anything heavier than M1 5W-30 is required for a Chevy.


GM uses M1 0w-40 in their corporate race program Corvette's. So it seems GM feels differently about that.
_________________________
Network Engineer
02 Expedition
01 BMW ///M5
06 Charger R/T

Top
#3247133 - 01/13/14 03:14 PM Re: Running 0W-40 where 5W-30 is specified [Re: Clevy]
novadude Offline


Registered: 01/16/03
Posts: 1351
Loc: mechanicsburg, PA
Originally Posted By: Clevy
The 0w-40 grade is something special. It meets many performance engine specs as well as the euro long drain specs and so on. I am not a Mobil fan at all however that oil is the one that would have me swallow my disdain for Mobil,especially if we could get it for the 25 a jug the American walmarts stock it for.


....and that is the whole reason why I am looking at this oil. It's a very robust product that would make me feel better about extended drains, and it doesn't cost a penny more than the M1 5W-30 I am running today.

Can't really believe that the pump would be in bypass all the time for such a minor change in Viscosity (Remember, it's a very light 40 wt).

Compare it to M1HM 5W-30:

Vis @ 40 = 69.2
Vis @ 100 = 11.7

M1 0W-40:

Vis @ 40 = 75 (8% higher)
Vis @ 100 = 13.5 (15% higher)

For comparison, M1HM 10W-30

Vis @ 40 = 78.1
Vis @ 100 = 12

Won't the 0W-40 shear down a bit in operation anyway?

Top
#3247139 - 01/13/14 03:21 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
Originally Posted By: novadude

Can't really believe that the pump would be in bypass all the time for such a minor change in Viscosity (Remember, it's a very light 40 wt).

What you're not comparing is the more relevant HTHSVs.
M1 0W-40 is 3.85cP vs 3.1cP for M1 5W-30. That's a big difference and it is HTHSV that correlates with oil pressure which is why the oil pump will still be in by-pass mode at elevated rev's at normal operating temp's in your engine.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247163 - 01/13/14 03:39 PM Re: Running 0W-40 where 5W-30 is specified [Re: CATERHAM]
demarpaint Offline


Registered: 07/03/05
Posts: 21382
Loc: NY
Originally Posted By: CATERHAM
Originally Posted By: novadude

Can't really believe that the pump would be in bypass all the time for such a minor change in Viscosity (Remember, it's a very light 40 wt).

What you're not comparing is the more relevant HTHSVs.
M1 0W-40 is 3.85cP vs 3.1cP for M1 5W-30. That's a big difference and it is HTHSV that correlates with oil pressure which is why the oil pump will still be in by-pass mode at elevated rev's at normal operating temp's in your engine.


Does oil pump remaining in by-pass mode at elevated rpm's at normal operating temps also apply to the 2014 Coyote Ford engine [calling for 5W50] with the track pack from another thread? The reason I ask is its sister engine w/o the track pack calls for 5W20 oil. Thanks.
_________________________
GOD Bless our Troops


Top
#3247168 - 01/13/14 03:49 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
aquariuscsm Offline


Registered: 12/30/06
Posts: 9937
Loc: South Texas,USA
How would one know if their car's oil pump is in bypass mode,and what exactly does it mean when that happens?
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Syntec 10W40/Fram Ultra
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Mobil 1 ATF
Redline Water Wetter

Top
#3247170 - 01/13/14 03:52 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
Shannow Online   content


Registered: 12/12/02
Posts: 26887
Loc: a prison island
If you have a pressure gauge, it reaches a figure then stays pegged. You can rev it cold, and see where it tops out at.

If you aren't on it continuously, then no problem...if you are, then still no problem, you are wasting energy.

Top
#3247177 - 01/13/14 03:56 PM Re: Running 0W-40 where 5W-30 is specified [Re: demarpaint]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
Originally Posted By: demarpaint
Originally Posted By: CATERHAM
Originally Posted By: novadude

Can't really believe that the pump would be in bypass all the time for such a minor change in Viscosity (Remember, it's a very light 40 wt).

What you're not comparing is the more relevant HTHSVs.
M1 0W-40 is 3.85cP vs 3.1cP for M1 5W-30. That's a big difference and it is HTHSV that correlates with oil pressure which is why the oil pump will still be in by-pass mode at elevated rev's at normal operating temp's in your engine.


Does oil pump remaining in by-pass mode at elevated rpm's at normal operating temps also apply to the 2014 Coyote Ford engine [calling for 5W50] with the track pack from another thread? The reason I ask is its sister engine w/o the track pack calls for 5W20 oil. Thanks.

That's a very good point which I didn't want to get into in that thread. I'm sure it is in by-pass at normal operating temp's just like it almost certainly is with Bimmers running TWS 10W-60.
Which means the oil will likely run hotter which will further thin the oil out so that eventually it will be out of by-pass but at a higher oil temperature equilibrium.
The point being, if you're not seeing the higher oil temp's with the lighter oil it is counter-production to run anything heavier.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247191 - 01/13/14 04:03 PM Re: Running 0W-40 where 5W-30 is specified [Re: CATERHAM]
novadude Offline


Registered: 01/16/03
Posts: 1351
Loc: mechanicsburg, PA
I don't really care if the pump is in bypass at high revs. I don't spend a lot of time at high revs. Besides, ALL oil pumps go into bypass at high revs, even with 0W-20.

Higher HTHS generally means higher film strength too, right? Better protecion?

Top
#3247202 - 01/13/14 04:12 PM Re: Running 0W-40 where 5W-30 is specified [Re: Shannow]
novadude Offline


Registered: 01/16/03
Posts: 1351
Loc: mechanicsburg, PA
Originally Posted By: Shannow
If you have a pressure gauge, it reaches a figure then stays pegged. You can rev it cold, and see where it tops out at.



No you can't (not on all cars). From what I've observed, the bypass restriction is going to let the pressure go higher when the oil is cold and thick and in full bypass mode. When the oil is hot and the pump is in bypass mode, the oil can pass through the restriction easier, and you see the true bypass value determined by the calibrated bypass valve spring .

I see my pressure bump close to 60 psi on the gage in my other vehicle when cold. When hot, you can rev it until it blows, and that gage will never to 45 psi.

I don't know how many millions of Chevy V8s ever survived the 1960s with no overdrive, running down the highway at 3000 rpm with pumps at the full 45 psi bypass for 1000s of miles with SF or lower API oils?

You guys are making too much of this bypass deal. Pumps run in bypass in all engines. It is not going to overheat your oil if you run the pump in bypass mode at high revs, unless we are talking about a track car. Can't see it ever being a concern on the street.

So anyway - back to the question at hand... Assuming I don't care about running a thicker oil than required, are there any real negatives to using M1 0W-40? From what I see, it's a superior oil to 5W-30 at the same price? Am I right, or am I missing something?


Edited by novadude (01/13/14 04:14 PM)

Top
#3247206 - 01/13/14 04:19 PM Re: Running 0W-40 where 5W-30 is specified [Re: CATERHAM]
novadude Offline


Registered: 01/16/03
Posts: 1351
Loc: mechanicsburg, PA
Originally Posted By: CATERHAM

The point being, if you're not seeing the higher oil temp's with the lighter oil it is counter-production to run anything heavier.


How do you know that? How can you tell that there is no temporary breakdown of the oil film at the piston/ring interface, etc? Maybe not enough to heat up the oil, but enough to initiate the wear process?

I am not saying go run 20W-50 in everything - I understand the benefits of thin oil (heat removal, less parasitic losses, etc, etc). However, there has GOT to be a reason why Ford, Mopar, BMW, etc all spec something heavier in their performance models that are going to take a beating.

Top
#3247217 - 01/13/14 04:32 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
Using your example 60 psi is your effective by-pass point.
The fact that the thinned out hot oil only is seeing 45 psi at high rev's is because you are operating well below by-pass.

You're asking the wrong question. If you are in by-pass at normal operating temp's running the heavier than spec' oil there are a whole lot of disadvantages. The point is, there are NO advantages.
When you say "it's a superior oil to 5W-30" what is are you referring to specifically. Higher AW and TBN levels?
You probably don't need the former and I don't thick you've expressed a desire to extend your OCI so no advantage there either.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247226 - 01/13/14 04:49 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
SHOZ Offline


Registered: 06/28/03
Posts: 1809
Loc: Illinois
My Genesis Coupe hits 75 lbs easily when the oil is cold. Then after it is warmed up it will hit 75 lbs at high rpms. If it gets to over 200F I don't think it hits the 75 lbs but the oil is seldom at that temp.

Top
#3247263 - 01/13/14 05:26 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
aquariuscsm Offline


Registered: 12/30/06
Posts: 9937
Loc: South Texas,USA
My car came with a sticker under the hood that says "10W is preferred" and recommends 10W30 and 10W40. Is their any advantages to me running 10W40 instead of 10W30 "wear wise" and/or vise versa?
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Syntec 10W40/Fram Ultra
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Mobil 1 ATF
Redline Water Wetter

Top
#3247269 - 01/13/14 05:30 PM Re: Running 0W-40 where 5W-30 is specified [Re: SHOZ]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
Originally Posted By: SHOZ
My Genesis Coupe hits 75 lbs easily when the oil is cold. Then after it is warmed up it will hit 75 lbs at high rpms. If it gets to over 200F I don't think it hits the 75 lbs but the oil is seldom at that temp.

What oil brand and grade are you running?
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247272 - 01/13/14 05:32 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
SHOZ Offline


Registered: 06/28/03
Posts: 1809
Loc: Illinois
M1 0w40.

I've run the 5w30 M1 and it will hit the 75 lbs when cold.

I should add I have a remote filter but the pressure sensor is after that.

Top
#3247281 - 01/13/14 05:38 PM Re: Running 0W-40 where 5W-30 is specified [Re: aquariuscsm]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
Originally Posted By: aquariuscsm
My car came with a sticker under the hood that says "10W is preferred" and recommends 10W30 and 10W40. Is their any advantages to me running 10W40 instead of 10W30 "wear wise" and/or vise versa?

And 15W-40 was spec'd for '96 BMW and even heavier grades for my '86 Porsche but 5W-30 and 0W-40 have been back spec'd for both cars respectively.
GC 0W-30 or M1 0W-40 would both be superior choices to a 10W-40 for a 300ZX. Even QS Defy 5W-30 would be a good choice.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247290 - 01/13/14 05:44 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
Clevy Offline


Registered: 11/11/10
Posts: 7437
Loc: Saskatoon canada
Originally Posted By: Shannow
If you have a pressure gauge, it reaches a figure then stays pegged. You can rev it cold, and see where it tops out at.

If you aren't on it continuously, then no problem...if you are, then still no problem, you are wasting energy.



My charger hits that at 65psi. It won't go any higher so I'm assuming that's my by-pass psi.

Originally Posted By: novadude
I don't really care if the pump is in bypass at high revs. I don't spend a lot of time at high revs. Besides, ALL oil pumps go into bypass at high revs, even with 0W-20.

Higher HTHS generally means higher film strength too, right? Better protecion?


Well not really.
If your engine only requires "x" film strength adding more doesn't mean less wear because the moving parts have an oil film separating them. A thicker oil film will add drag even if it's minutely.
However like I've already said the 0w-40 is something special. Nissan recommended it specifically for their race engines as well as Porsche and so on.
It's the only oil I'd break my boycott for to be honest,unless of course it was really cheap.
_________________________
2006 Charger RT
Miles x 2 per oil filter

Top
#3247292 - 01/13/14 05:45 PM Re: Running 0W-40 where 5W-30 is specified [Re: SHOZ]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
Originally Posted By: SHOZ
M1 0w40.

I've run the 5w30 M1 and it will hit the 75 lbs when cold.

I should add I have a remote filter but the pressure sensor is after that.

M1 0W-40 is heavier than necessary since you're not seeing high oil temp's.
I'd resume using the recommended 5W-30 grade at the next OCI.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247297 - 01/13/14 05:52 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
SHOZ Offline


Registered: 06/28/03
Posts: 1809
Loc: Illinois
That's my plan. Originally I did have oil temp problems big time. I then put on a tube and fin oil cooler that was less that stellar in performance and the adapter for it had thermostatic control at 160F. Too low when it was cool and was marginally effective when it was hot.

I've since gone to a water/oil heat exchanger on the filter mount. The radiator is way bigger than stock. I'm hoping this will take care of the heat. Most I've seen since putting that on is 215F at +90F ambient, AC on and 75 mph interstate travel. When it is cold the temp runs around 170-180F. T-stat is 180F.

Top
#3247298 - 01/13/14 05:53 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
CATERHAM Offline


Registered: 11/18/05
Posts: 9623
Loc: Burlington, Ontario, Canada
Originally Posted By: novadude
I don't really care if the pump is in bypass at high revs. I don't spend a lot of time at high revs. Besides, ALL oil pumps go into bypass at high revs, even with 0W-20.

Higher HTHS generally means higher film strength too, right? Better protecion?

Yes even with a 0W-20 you'll need oil temp's of 65-70C before you can use maximum rev's out of by-pass.

Higher HTHSV means the oil is heavier, period even at low normal operating temp's. It's simply more accurate to refer to an oil's HTHSV rating (if you know it) than it's KV100 spec'.
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

Top
#3247483 - 01/13/14 08:37 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
Shannow Online   content


Registered: 12/12/02
Posts: 26887
Loc: a prison island
Why would you be limiting your revs to stay out of bypass relief ?

Limiting revs because your pistons aren't round, and your block isn't straight is sensible...not bypass.

Top
#3247509 - 01/13/14 09:00 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
SHOZ Offline


Registered: 06/28/03
Posts: 1809
Loc: Illinois
At least for me the coolant can be up to temp, it is the oil that takes another 10 minutes/miles.

Top
#3247735 - 01/14/14 04:17 AM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
virginoil Offline


Registered: 09/05/05
Posts: 1044
Loc: western australia
Penrite has a plus 10 philosophy for vehicles in OZ see link below.

http://www.penriteoil.com.au/tech_pdfs/2...Extra%20Ten.pdf

The +10 is self explanatory. Unless you see snow I would use M1 5w-40 grade ie the same brand and additive package used by M1 5w30.

However at 147 000 miles ie approx 250 000 kms why change ?

Enough posts about switching causing leaks on this forum. The add pack in M1 0w40 I understand has much better cleaning properties, is it something you want to risk and take on at this stage of engine life ?

In summary IMO if its all good.
1. Thank God
2. Keep doing what you have been doing.
3. Switching causing leaks is not myth.


Edited by virginoil (01/14/14 04:30 AM)
_________________________
Hmmmmmmmmm now which tree/s in the Garden did He say I can eat from ?

Top
#3248067 - 01/14/14 12:04 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
Maxima97 Offline


Registered: 02/11/12
Posts: 322
Loc: WA - Washington
People in this forum thought they were out smarter than oil refinary and auto manufacturer by mixing their own cocktail without scientific proof. The result is unknown. But there must be a reason user manual suggests using particular weight of oil.
_________________________
97 Maxima, Maxlife 5W30
99 LX470,PU 5W30
98 Explorer,PU 5W30
93 Prizm, PU 5W30
01 Camry,G oil 5W30
95 Villager,Maxlife 5W30
05 Accord,Idemitsu 0W20

Top
#3248172 - 01/14/14 01:59 PM Re: Running 0W-40 where 5W-30 is specified [Re: CATERHAM]
ukmastermind Offline


Registered: 08/07/12
Posts: 104
Loc: Los Angeles, CA
Doesn't 0w-40 have better flow at any lower temp. than 5w-30??

That + the extra zinc/phos would make the 0w-40 better in my book smile

Top
#3248312 - 01/14/14 03:56 PM Re: Running 0W-40 where 5W-30 is specified [Re: ukmastermind]
901Memphis Online   content


Registered: 08/14/10
Posts: 6171
Loc: Northern Kentucky
Originally Posted By: ukmastermind
Doesn't 0w-40 have better flow at any lower temp. than 5w-30??

That + the extra zinc/phos would make the 0w-40 better in my book smile


No not necessarily. Depending on the product the 5w30 synthetic should be lighter until a certain point.
_________________________
1999 Ford Taurus 146k (Vulcan v6) - M1 High Mileage 5w30 | Fram Ultra XG 3600
2002 Buick Century 105k - Peak 5w30 / Fram Ultra XG 3980 / Filter mag

Top
#3248425 - 01/14/14 06:40 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
ziggy Offline


Registered: 08/08/05
Posts: 1100
Loc: stamford, CT
Would 0w40, or a 5w40 be better for a car that specifies 5w30 (98 corolla) in humid 97-102 degree heat, be better? Last year i ran 10w30 peak synthetic, it was good, but the engine had a watery consistency, i can sense it the oil. would a 0w40 or 5 or even 10w40 be better at those temps?
What i found out, was a 10w30 dino ate up a bit more fuel on me.2 miles a gllon a member here stated to me. the 10w30 synthetic didnt really eat up as much. so becuase its 40 weight, be it 0,5,10..ide imiagine fuel would go up quite abit on me.

Top
#3248468 - 01/14/14 07:23 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
901Memphis Online   content


Registered: 08/14/10
Posts: 6171
Loc: Northern Kentucky
Ziggy if your cooling system is working properly you should be using an API SN 5w30.
_________________________
1999 Ford Taurus 146k (Vulcan v6) - M1 High Mileage 5w30 | Fram Ultra XG 3600
2002 Buick Century 105k - Peak 5w30 / Fram Ultra XG 3980 / Filter mag

Top
#3297520 - 02/28/14 04:04 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
splineman Offline


Registered: 08/21/13
Posts: 78
Loc: New Zealand
Penrite recommend the HPR 5 5w-40 as a 5w-30 replacement.
Am I correct in saying that at HTHSV of 3.9 it is too thick, across all temps, as a direct 5w-30 replacement?
Excuse my ignorance if this has been spelled out.
_________________________
'05 Sportster 1200
'89 Honda GB 400

Top
#3297564 - 02/28/14 04:55 PM Re: Running 0W-40 where 5W-30 is specified [Re: novadude]
strat81 Offline


Registered: 01/09/10
Posts: 809
Loc: Nebraska
I ran Valvoline ML SB 5W-30 for 30k miles in my vehicle which has a GM aluminum 5.3L V8 with no AFM. It consumed the Maxlife at a rate of about 1 quart per 1,500 miles or so. I have no blue smoke and no apparent leaks or drops. Coolant does not show signs of contamination.

At ~85k miles, Nov2013, I switched to M1 0W-40. I've read that thicker oils may help curb oil consumption. This vehicle is also a short tripper, so I'm concerned about fuel dilution.

Oil consumption has not changed (yet). Fuel economy has not changed in any meaningful way or at least not in any way I can attribute to the oil. A 5,000 pound SUV with a V8 is a gas pig.

I have not noticed any changes in cold cranking, even at -6*F.

After looking at various posts on this site, in the PCMO section and UOA section, I have yet to see any proof that M1 0W-40 (or any other PCMO 0W-40 or 5W-40) caused problems for an engine. If these engines are operating in bypass for a significant amount of time while running xW-40, it does not seem to be hurting them in any appreciable way.

Dumping M1 0W-40 into my engine did not result in anything amazing or magical. From the driver's seat, it appears to be performing as well as the ML SB 5W-30 I had in there prior. I have enough left for at least 1 more oil change with it. After that I plan on trying QSUD 5W-30 or ML SB 10W-40. Why? I have them on the shelf.
_________________________
Molon Labe

Top
Page 1 of 4 1 2 3 4 >