Have been searching though the forums and there seems to be a lot of advice for RX330 owners to change their fluid at 60k but didnt find much for the RX350.
I have my car at an indy shop for the 60k service and told him that I wanted the tranny oil changed. He just called and told me that it specifically says on the dipstick (I think) that you should not change the oil. Supposedly he spoke to his contact at Lexus and they tell him the same thing. Furthermore the tranny oil is clear.
Ofcourse he said that if I still wanted to change the oil they could go ahead and do that but he'd rather stick with Lexus's recommendations.
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I`m not aware of any fluid that doesnt require a change at some point in time.Just like when clear coat paint became popular,they claimed it did not need to be waxed (yeah right!) Now the dealerships try and sell you a paint protection that last`s for a year or more,again yeah right.
2015 RX 350 AWD
2012 Mercedes-Benz C300 4 Matic Sport Sedan (wife`s car)
I'm not sure, but may be newer then 2004 models has last long fluid, Toyota called life time. If it's I would changed at 100,000, because it's synthetic, and last longer, but I'm not sure, you need to find out at the dealer or your manual.
the RX350 uses Toyota WS ( World Series ) ATF . Technically this fluid is good for the lifetime of the transmission as the transmission is " sealed " from the factory.
If your transmission is similar to the ES350 / newer Camry the ONLY place to flush your ATF is at a Toyota or Lexus dealer as the Toyota WS ATF has to be heated to the correct temperature before being poured in.
If your transmission is like the 04-06 LS430 then the heat cycling step can be skipped and therefore you can have it done almost anywhere.. just be sure to use ONLY Toyota WS ATF.
How long do you plan to keep the car? The transmission will last to 100k miles easlily without a fluid change. Personally I would change the ATF at either the 60k ( **** retentive ) or 100k ( less OCD ) service.
Just keep in mind I know for a fact that the ES350 requires heat cycling the WS ATF before you can put it in, if your transmission is similar it should NOT have a dipstick at all and service can only be performed by a toyota or lexus dealer. They will charge you 12qts @ $9-12/qt plus 2 hours labor @ $90-160/hr.
The 2007 RX350 and later uses World Standard Transmission fluid. This fluid is good for the life of the car. Check the service schedule in the maintenance section and you will see that no service is required. The only exception is if you are towing or taking the RX off road.