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What weight of oil??
nes-cv23:
What weight of oil would you guys recommend for a older 350 olds or chev ? 10w-30? 10w-40? I?ve heard of marine 25w-40?.
Mine are getting old and I want to make sure they last as long as they can? I?ve been running 10w-40, but I think I?d like to run something thicker? other than some honey style oil additives?
thedeuceman:
I run 20-50 diesel oil in my old stuff
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carlsoncvx18:
Ran rotella in my cvx18 since it was broken in.
Plugcheck:
As it pertains to marine engines only, I tend to favor lower viscosity 10w30 since boats rarely see the high temperatures that car engines do. Blended or full synthetics have some impressive figures, but overall I've found synthetics to "seep" a bit more as they are molecularly smaller. A straight 30 has some advantages as well, and for limited temp span engines in marine applications. High mileage oils have additives that tend to keep seals from leaking, works great in auto applications, but honestly never ran them in boats much. Pretty certain someone on the interweb has done more exhaustive studies related to oil. Curious to know what others results have been.
still_fishin:
I run 10-30 valvoline vr1 in both mine.
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