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JL8Jeff · 03-18-2008, 08:13 PM

I used to run 15W40 (I think) Mobil 1 in my old supercharged 93. You could tell from the sound of the engine when the oil was starting to break down. I don't like the ultra thin oils like 0W30 and 5W30, they're too thin for a daily driver. It's not worth the extra risk for a potential 1 or 2 hp. I run 20W50 in the SS396 but that's a different type of motor and synthetic isn't worth it.

03-18-2008, 08:13 PM	#37
JL8Jeff Hippy Mod, Bergermeister Meisterberger, Moderator Join Date: Aug 2004 Location: Ewing Posts: 6,216 iTrader: (3)	I used to run 15W40 (I think) Mobil 1 in my old supercharged 93. You could tell from the sound of the engine when the oil was starting to break down. I don't like the ultra thin oils like 0W30 and 5W30, they're too thin for a daily driver. It's not worth the extra risk for a potential 1 or 2 hp. I run 20W50 in the SS396 but that's a different type of motor and synthetic isn't worth it. __________________ 69 Z28 JL8 4 wheel disc brakes - being restored 09 Silverado Z71