Recent Topics
Snow Shoe Info Needed
by larryinnewyork
11 minutes 27 seconds ago
Article on antifreeze and pet poisoning
by schuylkill
41 minutes 53 seconds ago
Carlson Hardware
by greasegunn
Today at 05:57 AM
Dang! Snowblower Wasn't in 2WD for Years
by ronbo
Today at 05:56 AM
Nokian WRG3
by Patman
Today at 05:43 AM
Non linearity in mixing VIIs
by Shannow
Today at 03:23 AM
PPPP 5W20 Test Results ?
by ChrisD46
Today at 03:13 AM
Electric fence load
by mjoekingz28
Today at 01:46 AM
Would there be any negative effects?
by 268i
Today at 01:22 AM
How to kill a Leprechaun
by 285south
Yesterday at 11:46 PM
This just made me laugh
by Shannow
Yesterday at 11:19 PM
88-02 or so Chevrolet/GMC 1500
by mjoekingz28
Yesterday at 11:15 PM
Newest Members
dg370, Shuskey4, Student_Mike_77, Stanimal, Sharon
51979 Registered Users
Who's Online
59 registered (andyd, Bristol, 1foxracing, BobsArmory, Bandito440, Boomer, 5 invisible), 884 Guests and 184 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51979 Members
66 Forums
222513 Topics
3521610 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: 42
Loc: louisiana
with my oil pressure fluctuating someone suggested using 10w-40 instaed of 5w-30? is this bad advice? 2005 nissan frontier nismo 6 cylinder

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


Registered: 04/28/08
Posts: 26700
Loc: Ontario, Canada
Is this fluctuation observed through a stock gauge or a reliable aftermarket mechanical one?
_________________________
Network Engineer
02 Expedition
01 BMW ///M5
06 Charger R/T

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


Registered: 06/01/09
Posts: 1635
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: 9712
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
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

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


Registered: 01/09/10
Posts: 42
Loc: louisiana
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

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


Registered: 11/18/05
Posts: 9712
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
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

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


Registered: 12/30/06
Posts: 10000
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: 9560
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: 11756
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, Hastings LF113
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: 7330
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: 2622
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: 42
Loc: louisiana
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

Top