Synthetic Gear Oil

[ratrodz]

Is synthetic gear oil good or bad for leaks and wear?

Bob

[frankr]

I’ve never had any experience with it in an outboard, but I can tell you that the manual for my Dodge truck says that for trailer towing the rear axle gear oil should be drained and replaced with synthetic. So I guess that means Chrysler feels it is better for wear prevention. Works for me, we’ve towed the trailer to Alaska, plus across the 48 four times, plus more.

[fleetwin]

Well, kinda hard to say, depends on what oil you are referring to when you say "synthetic". The Merc/OMC partially synthetic lubes do claim to be better and absorbing a little water to minimize wear.
What gearcase are we talking about here? Some are more tolerant to water than others.

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