oil with zinc for 1977 350 chevy engine for 24'searay
I have 1977 searay 24' weekender with 350 chevy, im using wolfshead 40 weight oil and have hard time finding this oil. I was told I need Zinc additive in my oil for this older engine. is there a brand of oil that is more available for getting locally in Toledo area. I want to get the oil changed before I put boat in water and need to resolve this soon.
Straight weight oil verses multi viscosity oil
I was told many years ago that you should use straight weight oil because
when using a multi weight (IE) 15-40 the average marine engine does not reach 180 degrees (not including closed systems) therefore you are using only the 15 weight portion of the oil, the 40 weight portion only becomes effective at or over 180 degrees,dont know if this is true but it seems to make sence.
I use castrol straight 50 weight racing oil in my boat. I also agree that
Shell Rotella is probably the best, I use it in my trucks,front end loaders,Ect.
I am also a believer in the lucas products, I had a 1975 Lyman and the rear main was leaking and the lucas formula definatly worked. And I am not a big
believer of fix it in a can. lol Good fishing to all. Tinkertoy (john)