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What aftermarket gear oil can you use in a G80?

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Old 07-26-2004, 12:33 AM
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Default What aftermarket gear oil can you use in a G80?

that meets the GM standard?
thanks
specifically the Royal Purple Stuff:

My vehicle has a locking differential. Do I need to add additional friction modifiers when using your Max-GearŽ?

No. All viscosities of Max-GearŽ are formulated with hypoid friction modifiers necessary for use in clutch or cone type differentials. No additional additives are necessary.

advises?
Old 07-26-2004, 06:20 AM
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There was a little note card in my Eaton Posi that suggested I use GM lubricant as well as a GM friction modifier. I stuck with thier recommendations.
Old 07-26-2004, 06:23 AM
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GM specifies synthetic for the G80 without any additive needed. So royal purple should be fine.

When I put in my Auburn, they were very specific about NOT using synthetic but good old dino with additive on theirs........
Old 07-29-2004, 10:22 AM
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You can use the Max Gear in any differential no matter who makes it.

Auburn along with others state not to use a synthetic but none of them can tell you why.

Fact is none of them have tested Max Gear but we have and Max Gear works in all of them.
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