Re: Zddp question

Posted by Joe Santana On 2022/9/29 9:41:37

I can only tell you that I use Valvoline V1 high zinc racing oil 20-50 wt (not the synthetic version). I was told by a modern classics shop to only use high zinc oil.,For years I ran straight 30 wt, ordinary motor oil. For a long time I ran 15-40 wt. i think the most important piece of info is change the oil regularly, which I do every 2000 miles, about 3 times a year.