Recommended oil; for 88 Bullet, twin 502 Mrecs
 

What do you guys recommend for an oil for the midwest, LOTO. Interested in what others use.
Hugh Mills

Im seriously thinking about running Rotella 15 - 40w in my boat this year... its good enough for the Duramax and I usually run the oil about 7 - 10K miles. That should be equivilant to 4 months of abuse on LOTO.... running 500's w/ trs drives. Ran the 20 - 50w in the beginning, engines idled at 65 psi.... little to high for me. Who else has input ?

Super Charged 502's, Gas, 605hp.
I use Mobile 1 Synthetic 15/50.
It was recommended by my engine builder.
Change out oil every 10 hours of running time.

I use the Rotella 15W40.. Probably going to switch to synthetic now that they are broken in. Citgo makes an oil called Mystik for diesels/farm equipment. It is a heavy duty synthetic blend diesel 15W50.

I run Renegade Racing Oil...its a 20w50. I switched last summer and it made my motors start much easier. These old cold natured 454's needed it. Very happy with Syn 20w50 so far.

I use Rotella 15-40

I use valvoline racing 20W-50 in my 502's. Change it about every 25 hours. Boat sees 4k plus rpms about 2 or 3 times a year.

I think I am going to switch to Mobil 1 this year though.

I have always used valvoline racing 20W-50 also and change it at around 30 hours or when it first starts to not be clear. Its readily availaby at O'Reilly's.

Valvoline Racing 20w-50 Syn

I would say all of the above a good choices, personally I run Mobil 1 15w50. I have also used Full Synthetic Rotella 5w40, no complaints with that oil either.