I was wondering if anyone has used Royal Purple oil for their transmission or rear end. And was wondering if there is a noticable difference. Ive seen them use it on HPTV and they got about 5HP out of a newer Camaro. Just wondering if anyones got an opinion on it, which im sure you do.

 

I was curious about this too...I dont think synthetic is recomended...

 

I'm using it in my tranny, works great. No noticable difference in power, but it shifts so smooth now. No reason to not use synthetic in the tranny or rear end.

 

Yeah, im only talking about tranny and rear end. I just picked up a LSD an dwas thinking of going for Royal Purple.

 

I switched to purple in my transmission and rear differental. I can't tell you any difference because its still in the garage until the winters over.

John

 

Royal purple is ok, but redline is much better. Use a 2 quarts of MT-90 for the tranny, and 2 quarts of 75W90 for the rear end.