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#2153266 - 01/28/11 05:29 AM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
ChuckBerry Offline


Registered: 08/23/10
Posts: 261
Loc: Lafayette, LA
How much oil consumption are we talking here? About how many miles before you have to add a quart?

What are your driving habits with this vehicle? Lots of stop and go, mostly highway, or a mix?
_________________________
1998 Honda CR-V LX AWD
2006 Dodge Grand Caravan SXT 3.8L

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#2153374 - 01/28/11 08:40 AM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
rslifkin Offline


Registered: 06/27/10
Posts: 2310
Loc: Stamford, CT / Rochester, NY
I doubt a 5W-40 will hurt anything, but other than the possibility of a small drop in consumption, it won't help, unless you're running the engine much, much harder than normal, and seeing very high oil temps.
_________________________
1998 Jeep Grand Cherokee 5.9 Limited with Heads/Cam/Headers/Exhaust/Tune/Shift Kit/Suspension Work (185k miles, bought with 100k)
Rotella T6 @ 6k OCI

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#2153389 - 01/28/11 08:55 AM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
Steve S Offline


Registered: 01/20/03
Posts: 18449
Loc: East of IGO
Probably the bearing clearances aren't much different than previous engines Japanese engines have always had tighter clearances . WHAT THE OIL CONSUMPTION? If you had a hundred of the same engines operated in the same way some would use oil and some wouldn't, the bell curve thing. I used to fleet repair work and had the pleasure of learning some precious tidbits as such!!!A 5w-40 could be a big jump in viscosity. You want oil thin enough so the oil doesn't cost you power yet thick enough to protect your engine.
_________________________
Why do people post I want the best for my car,,, When there isn't anything that is the best on the car to begin with.

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#2153456 - 01/28/11 10:14 AM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
mrKiKaZ Offline


Registered: 05/25/10
Posts: 13
Loc: Rancho Cucamonga, CA.
Hey guys,

Thanks for all the informative information. Here's a little more info about my car.
It is supercharged and has 130k, mainly from lots of freeway driving daily with occasional spirited drives in the canyons and track days . I replaced the pcv valve like someone suggested yesterday, but the old one still seems good (never ever replaced).
Up to 115k miles my car would use no more then 1qt for 5000 mile oci.
Since 115k I've started to use just below 2qts for 5000 mile oci.

My owners manual says max oil consumption can be up to 1.1qt for every 600 miles. That seems really excessive! My cars never had to use near that much.

So far it sounds like 5w40 would be fine to run in my car but not the best choice. I suppose I should stay in the xW-30 oils, definitely going to try out high mileage.
While I'm not a fan of Mobil 1, they seem to be the only brand that offers a high mileage in full synthetic as I would like to stay with full synthetic oil even though I've read great things about valvoline maxlife. Seeing that I live in Socal, I'm probably going to try 10w30 high mileage.

Regarding use of rotella 5w40, I've emailed shell and was informed not to use it because my car still has catalytic converters in exhaust system.

I also had a UOA done fairly recently when I was using Castro edge, now I'm using Pennzoil ultra, still the same oil consumption with both BTW.

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1902754

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#2153498 - 01/28/11 10:46 AM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
Alex38 Offline


Registered: 04/16/09
Posts: 510
Loc: Curtice, OH
Valvoline does make a Full Synthetic version of MaxLife. It is available in both 5w30 and 10w30 in jugs at some, but not all, of the WalMarts in my area. You might also want to consider that oil, if you can find it. Going with M1 HM in either 5w30 or 10w30 is also a good choice, if you can't find the Valvoline.
_________________________
2009 Ford Taurus X: 5w20 Valvoline SynPower
2012 Ram 1500 HEMI: 5w20 Havoline Synthetic
2012 F-250 6.7 Powerstroke: 10w30 Rotella T5

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#2153708 - 01/28/11 01:57 PM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
Artem Offline


Registered: 10/30/10
Posts: 4507
Loc: Florida
Being boosted changes the whole situation. With the added power of the supercharger (more heat) i would recommend you trying a 5w-40.

Your engine could also be wearing out a little, with the added stress of Boost in an engine designed to be N/A, hence burning a bit more oil. I say its perfectly normal.

Check your oil level frequently.
_________________________
2015 Lexus ES300H with all the goodies - Factory Fill

2014 Mazda 3 Hatch i Touring 2.0L & 6spd - Mazda 0w20

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#2153749 - 01/28/11 02:25 PM Re: Is it okay to use 5w40 instead of 5w30? [Re: Artem]
mrKiKaZ Offline


Registered: 05/25/10
Posts: 13
Loc: Rancho Cucamonga, CA.
Originally Posted By: Artem
Being boosted changes the whole situation. With the added power of the supercharger (more heat) i would recommend you trying a 5w-40.

Your engine could also be wearing out a little, with the added stress of Boost in an engine designed to be N/A, hence burning a bit more oil. I say its perfectly normal.

Check your oil level frequently.


I've been supercharged for a long time and have always used 5w30 without too much oil consumption but as of lately my cars been using nearly 2 qts. for 5000 oci.

I'm so confused now, sorry I didn't mention the supercharger on my original post. Does this change the whole situation like Artem says? Should I try a 5w40?

I was thinking of using 5w30 high mileage first and if the oil consumption persists, try 10w30 high mileage oil.


Edited by mrKiKaZ (01/28/11 02:27 PM)

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#2153752 - 01/28/11 02:34 PM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
Catera Offline


Registered: 12/23/09
Posts: 200
Loc: Michigan, USA
Forced Induction means increased pressures on the internals and the bottom end so you need a thicker oil film to prevent that metal on metal contact..

Id say 5W-40 for winter... and a mix of 5W40 and 15W40 in the summer or just get the 10W-40 for summer time..
_________________________
2K1 Cadillac Catera Sport
L81 54 V6 24V 195RWHP 142.5K
Latest oil change.
5qt Mobil 1 HM Non-EC(10W-30)
3/4qt HDMO Rotella T (15W-40)
8oz. MMO

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#2153783 - 01/28/11 03:29 PM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
Audi Junkie Offline


Registered: 11/03/02
Posts: 11247
Loc: PA
Plenty of turbos run on 5w-30....actually all the ones I can think of.
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#2153902 - 01/28/11 05:32 PM Re: Is it okay to use 5w40 instead of 5w30? [Re: Audi Junkie]
Artem Offline


Registered: 10/30/10
Posts: 4507
Loc: Florida
Originally Posted By: Audi Junkie
Plenty of turbos run on 5w-30....actually all the ones I can think of.



Does mean a thing. Those are cars designed to handle boost from the factory. The Camry engine in the TC is N/A.

Adding boost to any engine without properly building the block will result in accelerated wear (its common sense) this is the problem the OP is facing @ 130k.
_________________________
2015 Lexus ES300H with all the goodies - Factory Fill

2014 Mazda 3 Hatch i Touring 2.0L & 6spd - Mazda 0w20

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#2153941 - 01/28/11 06:12 PM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
CATERHAM Offline


Registered: 11/18/05
Posts: 9874
Loc: Burlington, Ontario, Canada
Excellent UOA BTW!
If that's not proof you don't need go to a 40wt oil I don't know what is.
2,500 miles per qt of spirted driving is pretty good in my book.
I'd stick with Castrol Edge 5W-30 and enjoy your ride.
_________________________
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

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#2154358 - 01/29/11 08:47 AM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
jorton Offline


Registered: 07/04/03
Posts: 2880
Loc: San Antonio, TX
Originally Posted By: mrKiKaZ
Hey guys,

Thanks for all the informative information. Here's a little more info about my car.
It is supercharged and has 130k, mainly from lots of freeway driving daily with occasional spirited drives in the canyons and track days . I replaced the pcv valve like someone suggested yesterday, but the old one still seems good (never ever replaced).
Up to 115k miles my car would use no more then 1qt for 5000 mile oci.
Since 115k I've started to use just below 2qts for 5000 mile oci.

My owners manual says max oil consumption can be up to 1.1qt for every 600 miles. That seems really excessive! My cars never had to use near that much.

So far it sounds like 5w40 would be fine to run in my car but not the best choice. I suppose I should stay in the xW-30 oils, definitely going to try out high mileage.
While I'm not a fan of Mobil 1, they seem to be the only brand that offers a high mileage in full synthetic as I would like to stay with full synthetic oil even though I've read great things about valvoline maxlife. Seeing that I live in Socal, I'm probably going to try 10w30 high mileage.

Regarding use of rotella 5w40, I've emailed shell and was informed not to use it because my car still has catalytic converters in exhaust system.

I also had a UOA done fairly recently when I was using Castro edge, now I'm using Pennzoil ultra, still the same oil consumption with both BTW.

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1902754


Very useful info.
_________________________
"If everything seems under control, you're just not going fast enough."
- Mario Andretti



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#2154363 - 01/29/11 08:52 AM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
demarpaint Offline


Registered: 07/03/05
Posts: 22712
Loc: NY
Depends on what is causing the consumption. Shell did a study and found that 5W20 reduced consumption better than a 5W40 "if" it is the rings that is causing the problem. It goes against conventional wisdom but the proof lies in their study. If valve guides or seals are at fault a "thicker" oil would help. Experiment with both a 5W20 and 5W40 and see.

As a side note I would do an engine clean up with MMO as already mentioned, and go from there. JMO
_________________________
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#2154435 - 01/29/11 10:31 AM Re: Is it okay to use 5w40 instead of 5w30? [Re: mrKiKaZ]
cryption Offline


Registered: 01/15/10
Posts: 470
Loc: Willis, TX
I wouldn't run 5w20 in that boosted motor.
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#2154491 - 01/29/11 11:27 AM Re: Is it okay to use 5w40 instead of 5w30? [Re: demarpaint]
CATERHAM Offline


Registered: 11/18/05
Posts: 9874
Loc: Burlington, Ontario, Canada
Originally Posted By: demarpaint
Depends on what is causing the consumption. Shell did a study and found that 5W20 reduced consumption better than a 5W40 "if" it is the rings that is causing the problem. It goes against conventional wisdom but the proof lies in their study. If valve guides or seals are at fault a "thicker" oil would help. Experiment with both a 5W20 and 5W40 and see.

As a side note I would do an engine clean up with MMO as already mentioned, and go from there. JMO


Excellent point.
_________________________
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

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