Re: New available motor oil

Posted by d c On 2014/7/21 15:48:47

I saw the 55 service manual and svc counselor recommendation for straight weight oil 20 or 30 wt. I think all oils back then were non detergent. If your oil is black after 500 mi I believe some breaking down of the sludge is going on. It could also be some fuel dilution and a rich condition in combustion. After the first 2 oil changes on the clipper, I have used st 30 wt non detergent with a properly jetted modern carb in place of the leak prone 4gc and my oil is clean and golden color after a season of driving. Without a filter or with bypass filtration wont the crud get right passed the pickup screen on the oil pump and go straight to the main and cam bearings? I use a lead substitute additive in the gas tank and a splash of Marvel on fillup for the exhaust valve seats. I may add lucas to the oil but never MMO in the oil .