Rzide

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


Thanks!

ROB FREEMAN

iTrader: (2)

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.

f_inscreenname

I use the 4 in my mark iv motors.

SB

iTrader: (1)

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.

Baja Rooster

iTrader: (1)

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?

Wally

iTrader: (1)

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....

Wally

iTrader: (1)

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

Rattlesnake Jake

iTrader: (2)

Valvoline VR 1 Racing 20-50

cougarman

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

SB

iTrader: (1)

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