Correct grease for greaseable bushings?

[ntsqd]

For years I've been told that petroleum based greases accelerate the deterioration (oxidation?) of polyurethane bushings and make them start to squeak much earlier than otherwise. As such I've always used silicone based greases on polyurethane. Now I'm being told that petro-based greases are fine and do not shorten the longevity of the bushing. Which is correct?

 

[EnergyGeek]

NTSQD,

Thank you for your question,

Polyurethane being a synthetic is not effected by petroleum based greases. As where rubber (which is petroleum based) is.  Our proprietary formula for our polyurethane is resistant to many chemicals that would normally have an adverse effect on OEM rubber components. 

Silicone grease can be used without worries but Energy Suspension strongly recommends using our own Formula 5 grease for future installations and if that cannot be obtained than a "Quality" Marine formula grease is recommended. 

I hope this answers some of your questions and doubts, feel free to ask us any other questions that may arise in the near future.

Energy

[ntsqd]

The mfg of the related components is recommending a lithium based grease containing moly. I've not seen moly in marine greases. Is the marine grease recommendation due to water wash-out concerns, or is there more to it?

[EnergyGeek]

You are right on the money, the Marine grease is simply a replacement due to it's water repelling qualities and it's a good productive lubricant for polyurethane.

Energy