Modern Engine Oil Okay?

Posted by Eric Lowell on April 21, 1997 at 20:17:42

When I had my first "A", I dumped anything in the crankcase
that closely resembled oil. Would I be looking for trouble
to use a 10-40 or 20-50 modern oil, presuming that I change
it before it turns black? Thanks!
Regards from Maine, Eric