Diff oil

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Dec 11, 2017 | 10:49 PM

isfvss

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Racer

Joined: Aug 2016

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From: New South Wales

Diff oil

I know what the book recommends but is fully synthetic oil the best for a ISF 2011 DIFF just your thoughts would be appreciated cheers

Dec 12, 2017 | 10:06 AM

lorenr

Intermediate

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From: WA

Synthetic gear oil from any number of reputable manufacturers is an excellent product. I believe (chemist, retired) it is a better product than standard gear oil. In my opinion it does reduce friction because the number of long chain hydrocarbons is much greater.

Because I own so many vehicles and maintain all of them myself, I always use the lubricants that can go a long time between changes. Synthetics fit that requirement even though they are more expensive. I believe Toyota uses synthetic in their differentials to reduce friction which increases durability.

I believe there are only a few refiners that produce synthetic oils and lubricants. A friend of mine works for a Chevron lube plant and they receive it by rail car. I'm not even sure they add much in the way of friction modifiers.

Loren

Dec 12, 2017 | 11:14 AM

mikersoft

Lexus Test Driver

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From: VA

FWIW, I used this when I change my diff oil last spring.

-Mike

Dec 12, 2017 | 02:14 PM

Greatest

Pit Crew

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From: ky

So the book calls for 75w 85m, right? But many are using 75w 90. Is it the consensus that this is fine and or better?

Dec 12, 2017 | 02:55 PM

SoulFreak

Instructor

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From: Florida

https://www.clublexus.com/forums/is-...rear-diff.html

I used exactly what Mike showed above, Redline and same weight.

Dec 12, 2017 | 09:24 PM

clarionguy

Pit Crew

Joined: Oct 2012

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From: CANADA

I used the stock Toyota Diff stuff - came in a steel can.

remember to take the TOP off first - then the bottom drain one - just in case.

In my horrible case I got the top one off and could not get the bottom one off due to corrosion