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Originally Posted by TheDeal526
Hey thanks for the replies and advice. I only use Castrol 10W40 for motor oil. But I've been thinking about maybe replacing one quart of the Castrol High Mileage with the Lucas Additive.
Hey TRACYCULBERSON , is Slick 50 really bad? My mechanic swears Slick 50 is the greatest thing since sliced bread. I've never used it though.
I'm gonna do a search on the high mileage oils curtis73 , and also on that ZMAx stuff, because I'm really interested in what people think about that too. Personally I think ZMax ruined the engine in my Firebird.
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well a couple of years ago i purchased a 85 IROC-Z . The car had high miles , but ran great. I put enough miles on the car for two oil changes.
On the third time i tried slick 50 and before the next oil change it was one quart low . Maybe it was just time for rings or a good going through,
but i think slick 50 caused the problem.