Re: New available motor oil

Posted by d c On 2014/7/12 20:10:34

If your talking about a fully rebuilt engine hot tanked and totally cleaned OK but I think there is another issue with older engines. There is almost assuredly crud in the rocker shafts,oil galleys around the rope seals etc. It is best to let sleeping dogs lie. running detergent or synth will break down the old grime and send it through the oiling sys and these are bypass filtered systems so most of the debris will go straight to the bearings causing issues. The theory is to use non det. so as not to start breaking this stuff loose and the limited miles we drive these cars it will be ten or twenty yrs of driving before you have to worry about adding to the sludge buildup with the conv, non det oil. If your already running a synth or det. oil in a 40,50 year old engine, ?