Manual transmission fluid; use OEM?

[CoryM]

Originally Posted by Black_griffin6

I think I'll go back to OEM at this point, I need to know where know can find it.
Is Toyota WS ATF what Toyota actually uses in the Yaris?

You will be hard pressed to find OE bottles of fluid. Most dealers just use bulk, and actual OE fluid is near impossible to find and about $30+/L. Pretty sure it's P/N: 08885-81026

Get yourself some non-synthetic GL4 75w90 and you are going to be as good as it gets. May want to change the fluid again in a few months to get the last of the wrong stuff out.

[frankronne]

My car was shifting fine (at 68000 km) but I wanted something better so I changes to Redline Mt-90. Since then, it has gotten worse and worse over the course of 20 000 km. There is like a clunk when going into 3rd gear and now it's doing the same thing in 2nd (downshifting is wack to). So I went to the dealership to buy OEM fluid. They sold me some (which seems like bulk) at around $6 a liter. I went back to OEM fluid and it has not being better than before. Shifting is still clunky (especially in cold weather). It gets worse every month.

I consider trying another synthetic fluid. Which one you recommend me at a reasonable price? I'm now at 89000 km.

[B.B._07]

Originally Posted by CoryM

Get yourself some non-synthetic GL4 75w90 and you are going to be as good as it gets.

My thoughts exactly. Unless you're racing your car, pilling on massive mileage between changes, or you live in the arctic you won't see much benefit in using high dollar niche synthetics like Royal Purple, Amsoil, etc. If Toyota recommends regular old GL4/5 SAE 75W90 just use that. If you're car really needed Redline MT-90 than it would be the OE recommended fluid, but it's not.