Recent Topics
Abnormal Styling ?
by HTSS_TR
05/06/16 07:22 PM
It's that time again.... Ford front-end stuff
by OVERKILL
05/06/16 07:03 PM
Addicts using anti-diarrhea medication to get high
by Mr Nice
05/06/16 06:36 PM
PureOne PL24011 cut open
by AuthorEditor
05/06/16 06:21 PM
Hidden gem for ex-K&N Filter users
by Reddy45
05/06/16 05:54 PM
Chemical Guys Car Wash 1 Gal $13 Amazon
by gallydif
05/06/16 05:43 PM
2006 Charger - rack getting replaced
by OVERKILL
05/06/16 05:38 PM
A Story Worth Living
by LoneRanger
05/06/16 05:37 PM
Snake Oil Detergent - 0.37 Cents
by Greg L
05/06/16 04:35 PM
Wax for silver car
by 007
05/06/16 04:32 PM
Trump's empty picture frames
by SumpChump
05/06/16 04:05 PM
Is 0w40 slightly Thicker than 5w30?
by Greg L
05/06/16 03:53 PM
Newest Members
waldawg, Defcon, drivingaford, funkyheff, Ralph62
57814 Registered Users
Who's Online
86 registered (aquariuscsm, Astro_Guy, 2015_PSD, Al, 137_Trenton, 9 invisible), 0 Guests and 1 Spider online.
Key: Admin, Global Mod, Mod
Forum Stats
57814 Members
66 Forums
248563 Topics
4065553 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#2507810 - 01/27/12 07:18 PM 5w-30 vs 10w-40
awoess Offline


Registered: 01/09/10
Posts: 45
Loc: Maryland
with my oil pressure fluctuating someone suggested using 10w-40 instaed of 5w-30? is this bad advice? 2005 nissan frontier nismo 6 cylinder
_________________________
2007 Honda Ridgeline castrol gtx magnatec 5w20

Top
#2507813 - 01/27/12 07:20 PM Re: 5w-30 vs 10w-40 [Re: awoess]
OVERKILL Online   content


Registered: 04/28/08
Posts: 31401
Loc: Ontario, Canada
Is this fluctuation observed through a stock gauge or a reliable aftermarket mechanical one?
_________________________
02 Expedition
06 Charger R/T
14 Charger SRT-8

Top
#2507814 - 01/27/12 07:20 PM Re: 5w-30 vs 10w-40 [Re: awoess]
JRed Offline


Registered: 06/01/09
Posts: 1688
Loc: Virginia
Considering that you live in Louisiana it won't make much of a difference.

Go for it, I guess.


Edited by JRed (01/27/12 07:21 PM)
_________________________
06 Subaru Impreza WRX - Sold. The only mechanical thing I'll ever love.
07 Toyota Prius - Cheap synthetic and PureOne filters.

Top
#2507816 - 01/27/12 07:22 PM Re: 5w-30 vs 10w-40 [Re: awoess]
CATERHAM Offline


Registered: 11/18/05
Posts: 10037
Loc: Burlington, Ontario, Canada
Possibly yes.
OP does of course rise with engine rpm bur at a steady rpm it should be stable.
Under what conditions does it fluctuate?
_________________________
74 Lotus Europa, 5W-50
86 Porsche 928S, TGMO 0W-20 25% / M1 0W-40 75%
96 BMW 328i, Idemitsu/TGMO 0W-20 70% / M1 0W-40 30%
94 Caterham 7, FUCHS 0W-20

Top
#2507850 - 01/27/12 08:05 PM Re: 5w-30 vs 10w-40 [Re: awoess]
awoess Offline


Registered: 01/09/10
Posts: 45
Loc: Maryland
stock gauge... when i stop at a red light it goes just above the L and goes just above middle when driving? never reaches H level
_________________________
2007 Honda Ridgeline castrol gtx magnatec 5w20

Top
#2507856 - 01/27/12 08:10 PM Re: 5w-30 vs 10w-40 [Re: awoess]
CATERHAM Offline


Registered: 11/18/05
Posts: 10037
Loc: Burlington, Ontario, Canada
That just normal oil pressure behaviour.
Stick with the 5W-30 grade oil.
_________________________
74 Lotus Europa, 5W-50
86 Porsche 928S, TGMO 0W-20 25% / M1 0W-40 75%
96 BMW 328i, Idemitsu/TGMO 0W-20 70% / M1 0W-40 30%
94 Caterham 7, FUCHS 0W-20

Top
#2507859 - 01/27/12 08:12 PM Re: 5w-30 vs 10w-40 [Re: awoess]
aquariuscsm Online   content


Registered: 12/30/06
Posts: 13364
Loc: South Texas,USA
10W40 won`t hurt a thing. Is this a VQ? I know the VQ Maxima`s FSM lists anything from 5W30-20W50.
_________________________
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
#2507938 - 01/27/12 09:16 PM Re: 5w-30 vs 10w-40 [Re: aquariuscsm]
Merkava_4 Offline


Registered: 01/30/07
Posts: 13738
Loc: Clovis, CA
Originally Posted By: aquariuscsm
10W40 won`t hurt a thing.


What about startup wear? That 10W-40 takes a full 5 minutes to reach all
the bearings on startup, but 5W-30 only takes 2/100ths of a second. grin2

Top
#2508228 - 01/28/12 08:37 AM Re: 5w-30 vs 10w-40 [Re: Merkava_4]
Garak Offline


Registered: 12/05/09
Posts: 18032
Loc: Regina, Saskatchewan, Canada
Originally Posted By: Merkava_4
What about startup wear? That 10W-40 takes a full 5 minutes to reach all the bearings on startup, but 5W-30 only takes 2/100ths of a second. grin2


Of course, there's always that issue of immediate, catastrophic wear. wink

Aside from that, while CATERHAM has eloquently stated his case for 10w-30 being an obsolete synthetic grade, I'd argue that 10w-40 is about as obsolete a grade as one could possibly imagine, particularly in conventional. It was terrible oil years ago, and while oil certainly has improved, specifications have changed.

Any vehicles that currently specify a 40 weight oil are either diesels which spec HDEO (10w-40s tend to meet older diesel specs, not modern ones) or European cars, which have their own specifications, which the run of the mill 10w-40 certainly cannot meet. I can't think of any mainstream vehicle currently being sold in North America that would call for 10w-40 as the preferred grade in the manual.

For something well out of warranty that is speced for a 40 weight oil, 10w-40 would be at the bottom of my list of choices, unless it was dirt cheap. Up here at least, 5w-20, 5w-30, and 10w-30 are the grades that go on sale. So, my old truck and the Audi got 15w-40 at a much more attractive price than what 10w-40 goes for.

I know it takes 5 minutes for 10w-40 to reach all the bearings on start up, and probably double that for 15w-40, and maybe triple that north of the border. wink The 15w-40 was cheaper though.
_________________________
Plain, simple Garak.

2008 Infiniti G37 coupe - Mobil Delvac 1 ESP 5w-40, Wix 51358
1984 F-150 4.9L six - Quaker State GB 10w-30, Wix 51515

Top
#2508608 - 01/28/12 03:23 PM Re: 5w-30 vs 10w-40 [Re: awoess]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
It will still fluctuate, but in a different range.
Oils viscosity changes when hot/cold, and different RPM affect the pressure also.

Top
#2508720 - 01/28/12 05:43 PM Re: 5w-30 vs 10w-40 [Re: awoess]
dave1251 Offline


Registered: 07/15/05
Posts: 7964
Loc: Maricopa, AZ
Originally Posted By: awoess
stock gauge... when i stop at a red light it goes just above the L and goes just above middle when driving? never reaches H level


Does your check engine light come on? If not I suspect you do not have a low oil pressure.
_________________________
make the inside of your engine oil cap white.
don't use.

Top
#2508733 - 01/28/12 05:57 PM Re: 5w-30 vs 10w-40 [Re: dave1251]
TFB1 Offline


Registered: 09/03/10
Posts: 3491
Loc: VA
Originally Posted By: dave1251
Originally Posted By: awoess
stock gauge... when i stop at a red light it goes just above the L and goes just above middle when driving? never reaches H level


Does your check engine light come on? If not I suspect you do not have a low oil pressure.


I'm yet to see a "check engine light"(the amber one operated by the PCM), that was triggered by low oil pressure... A low oil pressure light will be red and operated by a sender that connects directly to the light circuit...

Top
#2508848 - 01/28/12 07:39 PM Re: 5w-30 vs 10w-40 [Re: TFB1]
awoess Offline


Registered: 01/09/10
Posts: 45
Loc: Maryland
my check engine light does NOT come on.... i think i'm over reacting a little bit? thanks for the advice.. i'll stick with 5w-30 Royal Purple
_________________________
2007 Honda Ridgeline castrol gtx magnatec 5w20

Top