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IS300H - Rear Differential Oil 75w-80 or 75w-90


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Hi,

Can someone please tell me which diff oil is to be used on the IS300h?

75w-80 or 75w-90

And how many litres required?

There is no mention of differential oil in the manual.

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Check page 585 Dess. Just had a quick look online and, assuming I got the right model, it has differential specs at the top. It says 1.35 litres, Toyota genuine differential gear oil 75w85 GL-5 or equivalent.

If it's not in your manual then I'm sure someone else will come along to confirm.

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Thanks @Bluemarlin its been so long that i forgot Lexus have user manuals online.

But just one more question... why is the online manual 500+ page but the user guide i have only 150 pages?

Oil capacity 1.15 L (1.20 qt., 1.01 Imp. qt.)
Oil type and viscosity Toyota Genuine Differential gear oil LT 75W-85 GL-5 or equivalent

 

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From my understanding some of Lexus fluids are classified as lifetime fluids , ie.no need to change unless you are replacing the components in question. 

This could be why it is not mentioned?

Is there a reason you want to change it?  Is it due to mileage or just something you've done on other cars.

Any fluid changes would be shown on service records if you have access to them.Lexus databases are good so simply quoting your reg  to a dealer may provide you with a background

The only other overiding factor for changing lifetime fluids would be if your car is subject to operating in extreme conditions , something like minus 40 degrees in the winter to +40 degees in the summer from memory so that would rule us out here in the UK 

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6 hours ago, agent_dess said:

But just one more question... why is the online manual 500+ page but the user guide i have only 150 pages?

To save money 🙂

3 hours ago, cadman2k said:

From my understanding some of Lexus fluids are classified as lifetime fluids , ie.no need to change unless you are replacing the components in question. 

This could be why it is not mentioned?

Rear diff oil is a scheduled service item on the IS300h, every major service (which seems a bit excessive to me but that is the schedule).

image.thumb.png.4cf1e7acf5b078b40b0a5f8d47360774.png

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