What oil to use in rear-diff?
#3
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Book/PDF shows 1st scheduled service for IS-F Torsen Differential (2010-2011) at 60,000 miles... See here 2011 Lexus IS-F Service Intervals
- Any sooner is really a waste, in my own honest opinion.
I would say you can easily wait till 30,000 miles..
Back in the day, I used synthetic Royal Purple Max Gear 75w90 on my IS300 w/Torsen LSD, every 30k miles
It was always clean when I drained and refilled...
I have to look at the manual and see what is says for the 2008-2009 IS-F
Joe Z
- Any sooner is really a waste, in my own honest opinion.
I would say you can easily wait till 30,000 miles..
Back in the day, I used synthetic Royal Purple Max Gear 75w90 on my IS300 w/Torsen LSD, every 30k miles
It was always clean when I drained and refilled...
I have to look at the manual and see what is says for the 2008-2009 IS-F
Joe Z
Last edited by Joe Z; 09-21-10 at 12:08 PM.
#4
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Changed mine at 30,000 miles with Royal Purple gear oil (2008 MY.) The old fluid still was golden in color, not dark, so I believe it was still good for another 30k. The magnetic drain plug had a very thin layer of metal shavings too, so minimal wear overall.
But the 2008 is an open diff, 2010's+ with Torsen will probably show more "wear" in the rear diff fluid.
But the 2008 is an open diff, 2010's+ with Torsen will probably show more "wear" in the rear diff fluid.
#5
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Oh man, I totally missed that my 2010 F was on a different differential oil change schedule than my previously owned 2009 IS-350. Thanks Joe! And thanks to everyone else too. When I do change it at 60,000, I'll have some good suggestions from you. This forum is great! Thanks!
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Oh man, I totally missed that my 2010 F was on a different differential oil change schedule than my previously owned 2009 IS-350. Thanks Joe! And thanks to everyone else too. When I do change it at 60,000, I'll have some good suggestions from you. This forum is great! Thanks!
But, I did my own IS350 at 30k and it was very clean... LoL
(not a true LSD in it anyways)
Dealerships will sell this service interval for every 15k miles...
Joe Z
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Even though maybe see that policy as a way to get more $ out of us.
Last edited by mdsbrain; 09-22-10 at 04:18 AM.
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Yeah unfortunately, the 08-09 falls under the “Inspect Only” criteria
(Just like all other regular 2IS’s that are RWD)…
I wonder if that’s because the Lexus Official recommendation is: it doesn’t need changing because there is no Torsen or true LSD unit in it..?!
or if the oil looks bad, then time to change the oil.
What should be the rule of thumb on this Lance?? Don’t change at all or change every Xx,xxxx miles ?
And I’m not concerned what the dealership service writer’s recommend .. LoL
Plus, I'm not going to inspect the diff oil every year..
But, I don't mine changing it every 30k miles per se.
Joe Z
Last edited by Joe Z; 09-22-10 at 09:10 AM.
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^^ Correct... !!!
Yeah unfortunately, the 08-09 falls under the “Inspect Only” criteria
(Just like all other regular 2IS’s that are RWD)…
I wonder if that’s because the Lexus Official recommendation is: it doesn’t need changing because there is no Torsen or true LSD unit in it..?!
or if the oil looks bad, then time to change the oil.
What should be the rule of thumb on this Lance?? Don’t change at all or change every Xx,xxxx miles ?
And I’m not concerned what the dealership service writer’s recommend .. LoL
Plus, I'm not going to inspect the diff oil every year..
But, I don't mine changing it every 30k miles per se.
Joe Z
Yeah unfortunately, the 08-09 falls under the “Inspect Only” criteria
(Just like all other regular 2IS’s that are RWD)…
I wonder if that’s because the Lexus Official recommendation is: it doesn’t need changing because there is no Torsen or true LSD unit in it..?!
or if the oil looks bad, then time to change the oil.
What should be the rule of thumb on this Lance?? Don’t change at all or change every Xx,xxxx miles ?
And I’m not concerned what the dealership service writer’s recommend .. LoL
Plus, I'm not going to inspect the diff oil every year..
But, I don't mine changing it every 30k miles per se.
Joe Z
If it is poorly assembled and the tooth contact pattern is bad, there is no oil made to reduce the pain and suffering this will cause. The factory does a reasonable job of this, so the factory build with the factory oil can last a ridiculously long time for an open diff.
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