Re: New available motor oil

Posted by d c On 2014/8/24 18:27:31

Autozone has the 30 wt st non detergent and detergent. Think I posted a pic already. Maybe on another thread. The clipper ran perfectly on it again today, I think the zdp add is needed for break in on new rebuild. Are you driving a recommissioned older engine or fresh? The lead sub and MMO is needed in the fuel tank if heads are orig. Think there is some confusion on the subject.

All engines prior to 1973 had non hardened exh valve seats. The lead in the fuel kept the valve seats cooler and lubed and help seal the exh valves. from 1974 on all heads were manufactured with hardened seats to run on no lead without burning valves. As part or reman -heads will be retrofit with hardened seats so no lead is required. the oils and fuel additives are for those running original engines