Rosella Oil
 

What version, t4, t5, t6 Rotella oil does everyone recommend for an older gen iv 502?


Thanks!

Run joe Gibbs mr 50 and be done with oil issues. Rottela t decent oil though. Ran it in my 598. Motor did grenade on next owner after he baught from me though. Don't think oil issue though. Part failure in head I believe.

I use the 4 in my mark iv motors.

Gen IV and V is flat tappet, unless HP500's. Rotella doesn't have the zinc/phosphorous that it used to have. It was one of the last hold out's to change.

Run something with higher amts than regular street oil.

Just to play the oil thread game...;)

My 502 Gen6 full roller came running Brad Penn 10-40. I always figured 20-50 for a boat, so was wondering if and when to move up? 70psi cold, 60psi when hot, drops to about 25psi at idle after a long run but recovers quickly to about 35psi at idle. Leave well enough alone?

I'd leave it alone...maybe look into getting a slightly bigger cooler if your worried about temps at high RPM's on long WOT times....

either that or add a bottle of the ZDDP additive to the oil when you change it :D

Valvoline VR 1 Racing 20-50

In Short... Joe Gibbs put all the good stuff back in that everyone else took out.
Went to one of there seminars... Great Oil!!

Jon

Winner winner chicken dinner...and a Makers Mark of course.