| validated opinions. So I was a regular user of MT-90 in my trans for years. My trans has 160k miles on it, and the only grinding comes from 3-4, or 5-4. The usual 4th gear syncro issue. Anyways, I like how my transmission functions, and I know nothing will "cure" or lessen that 4th gear grind. It's a mechanical problem. But I'm considering maybe switching to a higher performance oil? Shockproof blue-green perhaps? RP Syncro-mesh? Amsoil? Not sure. Looking around at the various products everybody says that their oil is the best (obviously) but I'm looking to see if anyone has had better experience with something other than redline, with more of a track/more aggressive driving application.
 The key to winning is knowing how to play the game. I am diabolically clever and can piss further than you can think...I always win.
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