Oil type for a 70's Suburban 350?

I prefer Kendall GT-1 in a 15-30 or 10-30. But Castrol 15-30 is good also. I would use a full synthetic or a blend.

I'll stick with my old buddy Pennz -

Ahh, but Kendall Gt-1 is GREEN! It's all a matter of personal preference, datobester. As you can see, you ask 4 different mechanics what they like, you'll get 4 different answers as far as brands. But I think we'll all agree that the 350 you asked about, we'll all agree, 10-30 or 10-40.

You just had to make things harder than it is-lol Yup! 10/30 and 10/40-Good nite buddy-c u in the AM Take care and God bless

You too.