Motor Oil?
#16
Originally Posted by Justind23
I've heard the same thing about fullsyn being bad for seals as well. Something about the oil running thinner than normal oil or something like that. I won't say I understand what that'* all about but I've used a blend in my cars to be on the safe side and it'* worked out well.
Full synthetic keeps things clean. A high milage engine has "sludge"built up and sometimes that "sludge" is keeping it from leaking. When you put full synthetic into a high milage engine that has always used conventional oil you will have leaks. It isnt that synthetic actually damages the seals.
I and the previous owner of the engine has always used Castrol synthetic 10w30
#17
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Originally Posted by Fiero3800sc
Full synthetic keeps things clean. A high milage engine has "sludge"built up and sometimes that "sludge" is keeping it from leaking. When you put full synthetic into a high milage engine that has always used conventional oil you will have leaks. It isnt that synthetic actually damages the seals.
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