Anyone who’s monkey’s with AMCs knows how much their V8 engine blocks weigh.
In the 90s my go-to winter oil was Esso XD-3 0W40. The other three seasons, mostly in small and big block Chevs, SAE 30 or 15w 40. My son’s 350 van on LPG used 15w50 Delvac year round. Back then, he lived in the...