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Anyone running 0W20, 30, or 40 in a 10W30 engine? #4536351
10/07/17 04:36 PM
10/07/17 04:36 PM
Joined: Nov 2013
Posts: 76
Rocklin, CA USA
Nicasio Offline OP
Nicasio  Offline OP
Joined: Nov 2013
Posts: 76
Rocklin, CA USA
Iíd like to know, would I benefit in switching to an 0W oil in my Mustangís 351W pushrod motor. Itís just a standard older 351W pushrod motor. 10W30 was what was always recommend back then. Car is hardly driven. Maybe once or twice a month.


2017 Nissan Armada AWD Platinum
2011 Honda Civic DX
2007 Subaru Impreza 2.5i Wagon
2006 Pontiac Vibe
2004 BMW 330i ZHP 6sp
1989 Mustang w/Vortech S/C 351w
Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536359
10/07/17 04:43 PM
10/07/17 04:43 PM
Joined: Jun 2011
Posts: 7,052
Mahzurrah!
KCJeep Offline
KCJeep  Offline
Joined: Jun 2011
Posts: 7,052
Mahzurrah!
Since you are in CA I am assuming brutal cold starts are off the table, so I would say NONE benefit wise. Unless you just want to use a real high quality full syn...it won't hurt anything either.


09 Lincoln MKZ AWD 97k - M1 AFE 0w30
12 KIA Sedona 91k - PP HM 10w30
09 Ford Focus 131k - Supertech FS HM 5w30
00 Chev Lumina 201k - Supertech FS HM 5w30
04 Jeep Grand Cherokee gone but not forgotten.
Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536370
10/07/17 05:12 PM
10/07/17 05:12 PM
Joined: Oct 2014
Posts: 11,816
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,816
Idaho
The real advantage of a 0W motor oil would be in below lets sat -30*f so no but run the oil anyway 0W-40 Mobil 1 Is a great oil


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536374
10/07/17 05:19 PM
10/07/17 05:19 PM
Joined: Oct 2005
Posts: 11,363
PA
d00df00d Online content
d00df00d  Online Content
Joined: Oct 2005
Posts: 11,363
PA
Originally Posted By: Nicasio
Iíd like to know, would I benefit in switching to an 0W oil in my Mustangís 351W pushrod motor. Itís just a standard older 351W pushrod motor. 10W30 was what was always recommend back then. Car is hardly driven. Maybe once or twice a month.

Depends on the 0w.

For example: If you pick a fuel economy oriented 0w-30 (e.g. Mobil 1 Advanced Fuel Economy 0w-30), it'll flow better on a cold start, even in a warm climate. However, being a modern synthetic that meets modern API and ILSAC specs, it should still protect better and last longer than an old 10w-30.

On the other hand, some 0w-30 and 0w-40 oils are formulated for tough long-drain Euro specs (e.g. Castrol Edge 0w-30, Mobil 1 FS 0w-40). Those are thicker overall, so they won't be much better than those old 10w-30s on a cold start in a warm climate -- but they'll protect and last WAY better.

If you go with a 0w-20, it'll flow WAY better on a cold start, and cool your engine better. Technically it won't be as thick as an old 10w-30 when brand new, but being a synthetic it'll hold up much better, so it might not be much worse by the end of an OCI. Hard to say how well it'd protect, though I wouldn't be shocked if it worked just fine.

Then there are those weirdo low-ash Euro 0w oils, like Mobil 1 ESP X1 or Pennzoil Platinum Euro LX. They meet really tough wear control specs and tend to have the best base oils, but they also have low-ash additive packs -- great for deposit control and catalytic converter health, good for wear, not good for OCI length.


2011 Mazda RX-8 R3
Mobil Super 5w-20
Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536394
10/07/17 05:56 PM
10/07/17 05:56 PM
Joined: Mar 2017
Posts: 5,364
Soviet State of Washington
PimTac Online content
PimTac  Online Content
Joined: Mar 2017
Posts: 5,364
Soviet State of Washington
What year is this engine? If it's old and has been running 10w all its life I would be leary of running a 0w in it. You don't have cold winters in your location. I would stay with what has been working all along.


2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter

Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536405
10/07/17 06:08 PM
10/07/17 06:08 PM
Joined: Sep 2010
Posts: 6,986
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 6,986
Texas
Yes, but GM does not agree ...

Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: d00df00d] #4536425
10/07/17 06:40 PM
10/07/17 06:40 PM
Joined: Sep 2015
Posts: 3,861
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,861
Connecticut
Originally Posted By: d00df00d

If you go with a 0w-20, it'll flow WAY better on a cold start, and cool your engine better...


Only at temps well below 0 deg F. It might not cool any better. And the thinner viscosity might be a detriment to your engine bearings without knowing more about this particular 351. For a factory original engine with plenty of miles and specced for 30 grade there'd be no 20 grade for me.

Considering your typical year round starting ambient temp is in the 30-100 degF range, any of the 0/5/10W oils will flow approx the same at startup. If it were me, I'd stick with the 5/10w-30/40 oils for your Mustang. The 10w-30 is still a good recommendation...especially from April-September. An A3/B4 0w-30/40 oil could still work well for you even if there's no real benefit to the 0w. If that supercharger is an add on, that could change things.

I note that Rocklin, CA hasn't made any new monthly temperature highs since 1988! It would appear there's no global warming in Rocklin.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536545
10/07/17 09:12 PM
10/07/17 09:12 PM
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
Rocklin can get down to 20* on some day/nights. I have a new to me 351 also and I will be trying 0W-40 Mobil 1 Euro formula to see if I can get it to work ... Engine has 83K and is still modestly tight, so I'm hoping that I won't have too many drain-off issues as the truck will sit for up to a week at a time ...

If it's noisy and clattery on cold start after sitting, it'll get swapped out for some Delo 400 15W-30 (on hand) or 15W-40 (readily available) and I'll move the 0W-40 to something else. I don't tolerate noisy cold starts. Mobil 1 has a spotty record in my various vehicles for cold start noise. But I know it's good oil, so I always give it a try smile

Plus I have stock in XOM, so I like to support the firm if I can laugh


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536555
10/07/17 09:21 PM
10/07/17 09:21 PM
Joined: Dec 2009
Posts: 25,355
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline
Joined: Dec 2009
Posts: 25,355
Regina, Saskatchewan, Canada
Something like M1 0w-30 AFE might give you a tick higher fuel economy, which you'll never measure, much less notice. Other than that, I can't think of much. Now, if you're already putting synthetic in there, M1 0w-30 AFE won't cost extra.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, NAPA Gold 7356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536589
10/07/17 09:57 PM
10/07/17 09:57 PM
Joined: Mar 2008
Posts: 5,839
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,839
South Florida

Flat tappet cam? Most of the passenger car oils have been watered down. I would not run 0W30.

Rotella 15W40 is what you want. Delo 15W30 or Rotella 10W30 are also good choices.


17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30


Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536590
10/07/17 09:59 PM
10/07/17 09:59 PM
Joined: Mar 2008
Posts: 5,839
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,839
South Florida
Double tap


17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30


Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536699
10/08/17 12:02 AM
10/08/17 12:02 AM
Joined: Nov 2013
Posts: 76
Rocklin, CA USA
Nicasio Offline OP
Nicasio  Offline OP
Joined: Nov 2013
Posts: 76
Rocklin, CA USA
Itís got a COMP hydraulic roller cam set up, Brodix aluminum heads, 11psi Vortech, BBK long tube headers, & Magnaflow high flow catalytic converters. I believe itís gotta be an early to mid 90ís short block. Like in the Ford Trucks/Lightnings. Dynoed 498hp/491tq to back tires at 5800 rpms. Makes 400lb tq at 2750 rpms. Been using M1 10w30 in it. I donít drive it much at all so I change the oil yearly. Winters are frosty here in Rocklin sometimes. Summers are in the 100ís... For my set up, what would yíall try to better the M1 10W30?


2017 Nissan Armada AWD Platinum
2011 Honda Civic DX
2007 Subaru Impreza 2.5i Wagon
2006 Pontiac Vibe
2004 BMW 330i ZHP 6sp
1989 Mustang w/Vortech S/C 351w
Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: d00df00d] #4536704
10/08/17 12:11 AM
10/08/17 12:11 AM
Joined: Dec 2002
Posts: 40,825
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 40,825
'Stralia
Originally Posted By: d00df00d
For example: If you pick a fuel economy oriented 0w-30 (e.g. Mobil 1 Advanced Fuel Economy 0w-30), it'll flow better on a cold start, even in a warm climate. However, being a modern synthetic that meets modern API and ILSAC specs, it should still protect better and last longer than an old 10w-30.


OK, where's your evidence for this old chestnut ?

It's not true, no matter how many people repeat it.

Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536729
10/08/17 01:06 AM
10/08/17 01:06 AM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Those hydraulic roller lifters are sensitive to oil viscosity. Go too thin and they'll bleed down and go flat. Go too thick and they won't pump up. If you switch to 0W-20 you stand a good chance of getting iron soup.

Re: Anyone running 0W20, 30, or 40 in a 10W30 engine? [Re: Nicasio] #4536764
10/08/17 03:49 AM
10/08/17 03:49 AM
Joined: Mar 2017
Posts: 5,364
Soviet State of Washington
PimTac Online content
PimTac  Online Content
Joined: Mar 2017
Posts: 5,364
Soviet State of Washington
Sounds like a HDEO would work fine here. Delo, Delva, Rotella, whichever brand you prefer


2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter

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