well i knoe alot of cirle track guys that put there motors through hell and they all use rotella 15/40 and have no problem they say its better because of what it has init vs. what a normal gasoline engine oil has i think it has somethin to do with zinc and teflon gives it a better caoting

Brad Penn is loaded with Zinc as well. Thats all I use in the racecars is BradPenn 20/50 and MobilOne full syn in my other vehicles... The green oil is great for gas or alky it doesnt get contaminated as easy and its the slipperiest stuff I have ever used.

I ran Pennzoil 25/50 Racing Oil this season. Good oil pressure (80 psi cold and 35 psi hot at 1000 RPM). I run Alcohol so I change after very weekend and, of course it is milky when I change it. The heat stayed down (150 in the box and 185 at the end of the run). I will stay with this oil next years as it's reasonably priced at NAPA.

rotella 15-40 with gm eos, 377 sbc, .0025 rods and mains. 7200 rpm, oil change every second w/end no abnormal wear. teardown every second year :D

Unless you have some old stock Rotella T oil it doesn't have all the zinc in it anymore. If you run flat tappets it is a must that you use something with the ZDDP in it or use an addative.

did they reduce it or eliminate it (zddp)

you bought into a myth of needing to change oil weekly on a alky car :shock: and if its milky you need to fix something :wink:

AMSOIL 15-40 Dominator Racing Oil
 

All my 588ci will ever see:
http://www.amsoil.com/storefront/rd50.aspx

20W-50 Valvoline VR1 racing formula. Never had a problem always stayed clean.

oil to use
 

i have a 496 bbc 200 shot i use brad penn 20w 50 the car weighs 3000lbs runs 9.75 all day long