Quote:
Originally Posted by Akya2120
I changed the OE fluid to motul 300 (trans and diff) at 1k miles I'm at 30k now. Should I even worry about changing it for the track day? The idemitsu should be okay for the diff right?
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I think choosing motul 300 for the track day is perfect. Motul 300 performs well once it warms up and a track day would be perfect for that. The maintenance interval for transmission fluid is like 30k, I mean I think it will be fine. Maybe change it after the track day. In regards to the diff, I feel like it will be okay. Fact is, if you go to Subaru Parts, they use 'Subaru high performance gear oil 75w90'. They would put this in to service your transmission and diff if you wanted to. Its a GL-4/5 rating and its made by Idemitsu.