Royal Purple friction modifier?

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May 3, 2011 | 12:08 PM

1987notchback

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From: MA

Royal Purple friction modifier?

so i decided to use royal purple for my rear diff service. royal purple says it has friction modifier in it? do i need to still add a seperate friction modifier? thanks mike

May 3, 2011 | 01:12 PM

drewactual

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From: Cape Carteret NC

I hope the answer to this is NO.. because I did my diff's with royal purple too..

May 3, 2011 | 01:15 PM

Matt99

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From: Shreveport, LA

I put the RP in and still used a friction modifier.

May 3, 2011 | 02:17 PM

weedahoe

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From: South GA

You can but it is not necessary.

May 3, 2011 | 03:26 PM

HammerZ71

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From: South Georgia/East Florida

I would NOT put an additional friction modifier in with the RP, unless it started to chatter on you, then I'd add it in half bottle increments to see if shuts up...