Chevy 366. What oil to use?

[herkyhawki]

What weight oil do you use in your 366 C.I. Chevy engines?

 

[sportyrick]

I run Shell Rotella T in all my gasoline engines. It is rated way higher than all the automobile manufacturers reccomendations and I have had stellar results from using it (25 plus years). My engines are always clean inside if I pull them down, I get a zillion miles out of them and if they smoke a little then it will go away when Rotella is used and oil comsumption is lessened. Yes it is pricey but in the realm of things it's cheap. sportyrick