What is the best oil for a S/C application?

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I have a 07 mustang gt with a stroker motor 5.0, with a f1-a procharger pushing 600+RWHP. This site was a link on a ford site and got me thinking what was the best oil and weight. I have been using mobil 1, but after reading a little I am leaning towards red line and amsoil. Any input will be appreciated!!
 
I am in Miami (fall winter) and NY (spring summer). I drive around 12000 miles a year, driving distances vary mostly 10-20 miles at a time. I will take 200-300 mile road trips though. I baby it most of the time, but like to get on it 2-3x a week. It will also start to see the track 1/4mile.
 
With that info, I wouldn't recommend as thick of an oil as I might have. Some very good synthetic 30 weight oil is what I recommend. Use none that lose significant viscosity (like M1 5w30).
 
I was thinking the 10w 40 from redline the info describes my use best: "Best choice for engines that typically run high oil temperature or for engines in daily-driven vehicles regularly operated in hot weather. Great for medium and heavy duty gasoline engines in trucks. Best choice for high-performance engines that see street/strip or track activity."
 
Originally Posted By: Johnny
I think you would be a good candidate for the new Amsoil Signature Series 0W30.


Seems a little thin to me.
 
That sounds nice but since most of your trips are 10-20 miles, your oil temperature probably will just get done reaching normal operating temp after 20 miles. So your oil will be plenty thick enough (too thick most of the time) on those trips. Wear will be dictated by chemistry of the oil, how you drive, and dirt ingestion, etc. but not much by its viscosity. So you need an oil with great chemistry.

On long road trips, I'm sure you'll spend most of it at light to moderate throttle. So that doesn't put much load on the oil films in your bearings.

1/4 mile drag strips, if it starts at full operating temps as it should for minimizing wear, a 40 weight may be more ideal than a 30 weight. If you don't do too many drag races, then changing to a thicker oil may not be worth it.

This is all about compromises. If you choose a 40 weight all the time, you won't hurt anything but may lose a small fraction of your 600 hp and may lose a little bit of gas mileage. This isn't an easy question with a definite right answer, at least that we can get.

Doesn't or didn't Ford make a supercharged engine that uses 5W-50 Motorcraft oil? Looking into that and how that engine compares to your could shed some additional light on the situation. Clearly Ford did analysis and/or testing and decided to use a 50 weight oil. It probably would shear to a 40 weight oil during use though. That may point to using at least a 40 weight oil after all.
 
With that kind of peak horsepower and potential for fuel dilution I'd start with Renewable Lubricants Bio-Synthetic Super High Performance SAE 40 HD, for it's super high flash point of 465F. It will take incredible amounts of abuse. It's a straight weight oil that has a high HTHS of > 3.5 and a pour point of -30F. I ran it in my RS4 engine (420 HP @ 7800 rpm) for 10K miles before changing, and that included about 8-10 hours on road racing tracks at wide open throttle. UOA results were superb. It also has been shown to run well in quite a few racing engines.

The 10W40 Redline is also a good candidate.

I wouldn't go to a lower viscosity ... yet ... until you run the oil for a while and have an oil analysis done. I'd do oil analysis after 2500-5000 miles, including some hard running, and see if it makes sense to change to the SAE 30 HD, or other lower viscosity oil. Terry Dyson's service is my favorite, for his analysis, professional interpretation and recommendations based on 35 years of experience with consumer, commercial and racing engines. Follow his advise to the letter and your engine will last a long time, no matter how hard you run it.

RLI Bio-Synthetic HD SHP Motor Oil SAE 40

RLI Bio-Synthetic HD SHP Motor Oil SAE 30

Dyson Analysis
 
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Any good synthetic such as Pennzoil Platinum, Amsoil, M1 is a good choice. Specific viscosity would really have to be determined through oil analysis.

PP 10w-30, RL 5w20, RLI 5w40, Amsoil SSO 0w30 and M1 0w40 would all be my choices.

Also check out http://www.renewablelube.com/, Highly regarded by some.
 
Solid or roller cam? Oil/coolant temp guages? Any info given to you by the engine builder about clearances etc.? Oil cooler?

Light cruising with occasional bursts, along with drag racing (of you're not hot lapping lap after lap) probably wouldn't get oil temps that high. I'd probably start with a robust 10w-30 - not an energy conserving oil. Something like Redline or maybe Rotella if you could find it. But if you have a roller valvetrain, you could use any 10w-30.
 
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Originally Posted By: JAG
That sounds nice but since most of your trips are 10-20 miles, your oil temperature probably will just get done reaching normal operating temp after 20 miles. So your oil will be plenty thick enough (too thick most of the time) on those trips. Wear will be dictated by chemistry of the oil, how you drive, and dirt ingestion, etc. but not much by its viscosity. So you need an oil with great chemistry.

On long road trips, I'm sure you'll spend most of it at light to moderate throttle. So that doesn't put much load on the oil films in your bearings.

1/4 mile drag strips, if it starts at full operating temps as it should for minimizing wear, a 40 weight may be more ideal than a 30 weight. If you don't do too many drag races, then changing to a thicker oil may not be worth it.

This is all about compromises. If you choose a 40 weight all the time, you won't hurt anything but may lose a small fraction of your 600 hp and may lose a little bit of gas mileage. This isn't an easy question with a definite right answer, at least that we can get.

Doesn't or didn't Ford make a supercharged engine that uses 5W-50 Motorcraft oil? Looking into that and how that engine compares to your could shed some additional light on the situation. Clearly Ford did analysis and/or testing and decided to use a 50 weight oil. It probably would shear to a 40 weight oil during use though. That may point to using at least a 40 weight oil after all.


Yes but its a roots blower, I was wondering if a centri would effect my oil decision at all.
 
I've been through several teardowns making about the same hp as you and the trend I've seen is the thicker weight oils do protect better even when driven easy most of the time. I've always used 20-50 but when the car is up and running again, can't wait to try out Redline's 40wt oil. This may go against most people on the board but I would not run a 30wt in that car.
 
Originally Posted By: strokerrr
I have a 07 mustang gt with a stroker motor 5.0, with a f1-a procharger pushing 600+RWHP. This site was a link on a ford site and got me thinking what was the best oil and weight. I have been using mobil 1, but after reading a little I am leaning towards red line and amsoil. Any input will be appreciated!!


Since we are beyond factory warranty coverage, your choice are opened up indeed.

If you want to consider a "light" 10W-30: Amsoil ACD
Or if you want to pop up to a 10W-40: Amsoil AMO 10W-40
Something in between:
Amsoil DEO 5W-40
 
Originally Posted By: strokerrr
Its a modular 4.6 SOHC that I had stroked to a 5.0


I thought the f1 was a centrifugal. Looks like I need to get out a little more.

Cetri vs roots may affect the oil choice a bit. Are you running a manual or auto and if auto, what's the stall? I run a heavy oil partially because my peak torque of 620lbs is fairly low at the stall speed of my convertor which is 3,800rpm.
 
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No sorry maybe I am not being clear
Facts about my car:

Engine= Modular 4.6 SOHC --- larger crank stroked to a 5.0 SOHC
Supercharger= Centrifugal --- Procharger F1-a (self contained oil)
Transmission= Manual --- Tremec 3650 (stock) ... hoping to have t56 by the fall

Buick I meant that the engine Ford built used a roots blower. (my bad lol)

I am looking for a heavier weight, I am thinking 10w 40. The car will not see any real cold weather either. I am stuck between red line and amsoil. Any advice between the two? Thanks everyone for the input. This forum is awesome!.....
 
I wonder how M1 15W50 silver cap would fare in your Mustang? Buick mentioning that he was a 20W50 user.......there was a guy at one of the auto parts stores here I met a while back that had a Buick GN and he used Amsoil 20W50.
 
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