Gs300Rus

Hi All,

I need to replace transfer case fluid and differential fluid on my family's Lexus RX 350 2007.
Please let me know the best type of fluid available and you would recommend.

Thanks in advance.

RX330inFL

First, start with the specs from the Owner's Manual"

http://drivers.lexus.com/t3Portal/do.../sec_06-01.pdf





Synthetic would be a good way to go with these. I have found it hard to get an 80W90 synthetic gear oil, but going with a synthetic you gain some leeway to go with a 75W90 which also flows a bit better in very cold temps. Being I like to use Mobil 1 products as they are readily available most all places, I would consider going with:

http://www.mobiloil.com/USA-English/..._75W-90LS.aspx

There are other gear oils available and would use the same reasoning in selecting one of those. In short, look for a readily available synthetic gear oil and change it regularly -- more often than noted in the Owner's Manual.

kickin8

iTrader: (1)

http://www.eneos.us/product/8

I've also used Mobile 1 too....both are good stuff!

EDness

any synthetic 75w90 is fine. Mobil 1, royal purple, amsoil, etc, etc.


I used amsoil severe gear, there's a local dealer near me so it was easy to get.

spacecraft

I suspect that they specced an 80W-90 (which is indeed not very common) just as a trick to make people buy their OEM oil.
In fact, also splitting between the monograde and a multigrade, based on the external temperature, just doesn't make any sense.
A SAE 75W-90 has exactly the same specs as a SAE 90 or a SAE 80W-90, at operating temperature.
It just has a bit lower viscosity at very cold temperatures.
But since at cold temperatures, the viscosity is ALWAYS too high, it never hurts to have a lower "W" viscosity. Quite the opposite, in fact.