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Old 11-30-2009, 12:19 PM
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Join Date: Jul 2004
Boat: 1998 Ski Nautique
Location: End of my rope.
Posts: 25,902
Originally Posted by Chicago190 View Post
That article is over 10 years old. Good info, but the zinc content is unreliable because it was only the last few years that the EPA mandated lower levels of zddp in oil because zinc build up on catalytic converters was causing poor performance.
That's the key. For more than you ever wanted to read about the subject, you can hunt down an oil thread from about 2007 on The horse was pretty well beat to death.

There was a later thread over here, too. From that, it was somewhat settled that the MC engines that would need to be worried about these things are any Fords and the pre-vortec TBI Chevies.
Previous: 1993 Prostar 205

Red 1998 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG.


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To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.
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