Re: Proper gas for 374 engine

Posted by bozonono On 2011/2/26 0:23:46

Sunoco on the east coast had a multi grade pump with about 5 or 6 different octanes. the 260 was at least 100 octane. but the 352 and 374 also did will on a medium and regular grade as i remember. the noticeable difference was the tone of the exhaust. on the Sunoco 260 the tone deepened. If i was filling the tank it was cheap gas. If i was charging it on the old mans account it was the high end.