AWD oils

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Dec 18, 2011 | 08:40 PM

bcg02

Thread Starter

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Joined: Dec 2011

Posts: 60

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From: IA

AWD oils

It is ok to use 75w-90 rather than the 85w-90 spec' d in the manual for rear diff and transfer case? if so, why does lexus spec the thicker oil?

Dec 18, 2011 | 09:04 PM

carguy07

Lexus Champion

Joined: Nov 2005

Posts: 2,110

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From: OH

Quote:

Originally Posted by bcg02

It is ok to use 75w-90 rather than the 85w-90 spec' d in the manual for rear diff and transfer case? if so, why does lexus spec the thicker oil?

Yep, totally fine. Probably what they had a stock of when they made them,

Dec 19, 2011 | 03:48 AM

mckellyb

Lexus Test Driver

Joined: Jul 2003

Posts: 1,002

Likes: 152

From: Texas

Don't worry about it at all.

If anything, the 75W is better for lubrication until everything is warmed up, but only very slightly.

I put synthetic in my wife's RX, all around, and I don't plan on changing it but maybe one more time in the car's 'life'.