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#4443495 - 06/28/17 07:45 AM Mobil 0w40 good enough for a race car
junkyard_sal Offline


Registered: 08/28/14
Posts: 5
Loc: NY, NY
I have a BMW e36 M3 race car. Would the members of this forum feel comfortable running Mobil 1 0w40 European formula in a racecar?

The alternative is Redline racing 40w which I believe is a 15w40.

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#4443504 - 06/28/17 07:53 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
Vladiator Offline


Registered: 01/04/16
Posts: 728
Loc: NC
For a racecar I vote for Valvoline 5w40 MST. Available at AAP for good prices, and will take all the abuse you throw at it. M1 0w40 becomes a 30w real quick.
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Thicker oils give protection for severe operations such as driving in mountains, pulling a boat, dusty conditions, short trips, high rpm, overloading, overheating and overcooling. Thin oils give MPG.

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#4443519 - 06/28/17 08:07 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
racin4ds Offline


Registered: 05/07/10
Posts: 984
Loc: Ocala, Florida
Years ago when I worked for PTG (North American BMW Race Team for ALMS) we ran Castrol 0W40 right off the shelf. I'd think M1 0W40 would be up to the task, its a stout oil and the only M1 oil I will use.
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#4443522 - 06/28/17 08:14 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
barkingspider Offline


Registered: 12/22/13
Posts: 2051
Loc: socal
Are you changing the oil after every race? The redline racings looks like it would fit good in your application
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#4443539 - 06/28/17 08:32 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 11970
Loc: N.H, U.S.A.
Oil chemistry is compromised for LL application. I would use something else.

Is the exhaust open with no catalyst?

what motorsport?
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#4443541 - 06/28/17 08:35 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
4WD Offline


Registered: 09/21/10
Posts: 6424
Loc: Texas
Why not 15w50 ?

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#4443547 - 06/28/17 08:40 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
Seventh Offline


Registered: 11/11/12
Posts: 234
Loc: NorCal
E36 m3 was built before LL-01 was a thing. LL-98 was the spec for those cars originally. The factory oil we put in those was 15w-40.

LL-98 spec is tough to find these days, but I do know that Motul x-cess 5w-40 used to meet the spec, per the 5 year old bottle on my shelf in the garage. Not sure it still does tho.

I wouldn't hesitate to use M1 in that. It is up to the task. Pretty much any 40wt synthetic will be acceptable imho.

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#4443552 - 06/28/17 08:52 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
oil_film_movies Offline


Registered: 06/13/16
Posts: 2569
Loc: MN
Originally Posted By: junkyard_sal
I have a BMW e36 M3 race car. Would the members of this forum feel comfortable running Mobil 1 0w40 European formula in a racecar?

The alternative is Redline racing 40w which I believe is a 15w40.


It depends on how long the race is. M1 0w40 has a reputation for shearing down in viscosity from breaking the VII additives. No endurance racing then. Anything over an hour and I'd go for Castrol Edge 0w40 if you need that extra bit of horsepower on the ground, and Mobil1 15w50 or Redline 40 if you don't mind the slight horsepower loss from using thicker oil, yet want your engine to be more reliable.

Tradeoff: More HP to win, then use Castrol Edge 0w40.
More insurance on durability: Go with the thicker HTHS synthetics.
Whatever your priorities are.
And only use M1 0w40 if the race is an hour or less.

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#4443554 - 06/28/17 08:55 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
dparm Offline


Registered: 04/19/10
Posts: 13466
Loc: Chicago, IL
Originally Posted By: junkyard_sal
I have a BMW e36 M3 race car. Would the members of this forum feel comfortable running Mobil 1 0w40 European formula in a racecar?

The alternative is Redline racing 40w which I believe is a 15w40.





The term "racecar" is pretty vague. What kind of racing? How modified is the engine? What kind of tracks will it see? How often will it get raced? etc.
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#4443570 - 06/28/17 09:16 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
robertcope Offline


Registered: 01/10/08
Posts: 1001
Loc: TX
In the past, we've talked about professional race teams at major races using M1 0W-40 in their motors. So, yes, it would seem that it is up to the task for a race car. I've used it in my track cars, as well, without any issues that I know of.

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#4443591 - 06/28/17 09:30 AM Re: Mobil 0w40 good enough for a race car [Re: oil_film_movies]
junkyard_sal Offline


Registered: 08/28/14
Posts: 5
Loc: NY, NY
Most of the races are half an hour sprints with an occasional 1 hour "enduro" We run Redline 40W racing in the enduro cars that do 12 hour runs and we change the oil nightly. I change my oil every ten hours.

The exhaust is open, no cats.

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#4443593 - 06/28/17 09:33 AM Re: Mobil 0w40 good enough for a race car [Re: dparm]
junkyard_sal Offline


Registered: 08/28/14
Posts: 5
Loc: NY, NY
In my class the engine is stock except for a cold air intake, removal of emissions devices (like the startup air pump), and a no cat 3" exhaust. The car will rev to 7000 but I have a 7 quart oil pan and an oil cooler that keeps temps well in line, normally 215-225F unless I am in traffic in which case I need to run the fan to force more air through the radiators but that is more for coolant temps than oil temps.

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#4443612 - 06/28/17 09:51 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
UncleDave Online   content


Registered: 06/02/14
Posts: 1646
Loc: Ca.
Ilmor engineering recommends M1 0w-40 for my 710 marine engine.

Operationally it spends most running hours in 2 conditions idling (in and out of marinas)or running between 4-6K for hours on end.

Change at 20 hours.

UD




Edited by UncleDave (06/28/17 09:52 AM)
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#4443668 - 06/28/17 10:41 AM Re: Mobil 0w40 good enough for a race car [Re: junkyard_sal]
mcrn Offline


Registered: 11/30/05
Posts: 3201
Loc: FL
Do you know your oil temps and pressures?
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#4443731 - 06/28/17 11:21 AM Re: Mobil 0w40 good enough for a race car [Re: mcrn]
Mitch Alsup Offline


Registered: 04/25/05
Posts: 729
Loc: Austin Texas
Originally Posted By: mcrn
Do you know your oil temps and pressures?


This !

If the oil temps stay under 250F then xxW-40 is good. If they get any higher I would go to xxW-50.

But for racing, I find better shear resistance from Ester base stock oils than PAO base oils. Not much, but a little.
You are going to want 1100-1400 ppm of ZDDP to protect the finger followers.

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