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

[BuickGN]

Originally Posted By: strokerrr
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!.....



That makes more sense. I haven't kept up with the racing world for the past year and I'm already forgetting many things.

I think the 10-40 would be great for your car. I'm a big Amsoil fan and use it in the TL but I've never tried it in something with power. My eye is on Redline's straight 40wt which also can be classified as a 15-40 with no VIIs and has a very high HTHS. I'm not saying Amsoil won't suit your needs but Redline seems to be geared more toward racing and I like the idea of straight weight synthetics for racing.

Good luck with the Mustang. Sounds like a fun car.

 

[Steve S]

15w/40 Amsoil Diesel Marine oil you don't need the cold startup viscosity and with no viscosity improvers "in theory at least "will give a little stonger oil for the potential pounding with the supercharger?

 

[98LSC32V]

Just a food for thought, John Mohivitz has the highest horsepower Ford modular motor (4.6 DOHC twin turbo) on the planet at over 2000 horsepower and runs 0w-20 at the track. He rebuilds the motor about one time a year.

 

[BuickGN]

Originally Posted By: 98LSC32V
Just a food for thought, John Mohivitz has the highest horsepower Ford modular motor (4.6 DOHC twin turbo) on the planet at over 2000 horsepower and runs 0w-20 at the track. He rebuilds the motor about one time a year.


And the oil probably runs 140 degrees...

 

[gtx510]

not 140F coming out of the turbo...


Are the bearing clearnaces on your stroker tighter or looser than stock?

 

[Drew99GT]

I'd run Redline 10w30 and call it a day. If it was a non-mod motor, I'd go thicker. You'll probably roast something else in the driveline besides the engine with that much power......before engine oil becomes a key factor. And if there were to be an anomaly in the motor - particle through a bearing, bad torque reading when installing a rod cap etc., oil is not gonna save it.

 

[buster]

Amsoil SSO 0w30 deserves a shot.

 

[BuickGN]

Originally Posted By: gtx510
not 140F coming out of the turbo...


Are the bearing clearnaces on your stroker tighter or looser than stock?


If the car is just idling around there's not that much heat going into the oil from the turbo. Assuming it's a ball bearing turbo, there's much less oil flow into the turbo compared to the old bushing style so less oil coming out to heat the oil in the pan. Besides, I'm sure the car in question isn't your standard 5 quart wet sump system. It could easily be running 140 degree oil temps.

 

[gtx510]

I agree, I'm just saying that 140F sump temps doesn't mean ALL the oil won't get hotter than that.
Less oil passing thru the CHRA but the turbine shaft is just as hot. Do you think less oil would heat up more?


And how long does Mohivitz run his oil for? One 1/4 mile pass?
Custom blend or the same 5W20 that we get off the shelf?