Saab guy, awsome.. I have had many saab, turbo's all of them... I ran that stuff in my saab to with no problem at all... i wouldn't understand how you got enough pressure to blow out a bolt.. that kind of presure you would blow out a gasket, seals, hell the entire motor. That wasn't from the lucas... just a coincidence. I would try it in the 5.0, if it does anything, suit the company for a new motor then.. problem solved.. hehe... yea synthetic on older rings blows out.. I however only ran synthetic.. maybe in your case i would 20W50.. especially if you in the 3k range alot.
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