I'm almost out of quaker state dino 10W-40 so I was wondering if anyone could help out:
1981 Ford 302 V8
currently has 97000 miles
Slightly worn in that there's some blowby in the crankcase breather filter and I had to change the valve stem seals awhile ago. I can sometimes smell engine oil in the exhaust tho - the rings are probably worn.
I've used 10W-40 since the start, but should I switch to anything thinner/thicker?