I have tried basically all the top brand oils and recorded time,temp and how well it stood up after 40 runs at the track,this is my result:
Best parrafin based oil(regular motor oil): Pennzoil 10w30
Best Synthetic Blend: Castrol 5w30
Best Full Synthetic: Royal Purple 5w15 ( best 1/4 times) overall
We tested 5 major brands on 2 almost identical Mustangs and these are the best WE found based on ET and durability.
I personally run royal purple in MY Stang. try your own tests and see what works best for you.
__________________
Jack
1989 Mustang LX: Converted to Carb.650 AED Holley DP,Weiand Stealth Intake,Edelbrock Performer RPM Aluminum Heads,Hooker Super Comps, Ground Pounder Uppers and Lowers,Moroso Drag Springs,NEW COMP Xtreme Energy Cam and 1.6 RR. ,a few other goodies.*** New 1/4 times-12.50
1987 SC GT ( fast as hell)
2001 Powerstroke Tow Vehicle 1989 Coupe.
Sometimes when you cry,no one sees your tears..........
Sometimes when you are happy,no one sees your smile.........
But,FART just ONE time..........
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