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I like Redline products, but I have mixed feelings on MT-90. I've used it in 2 different transmissions with the same results: excellent smooth shifting once the fluid is warmed up, but very notchy shifting when cold. I believe MT-90 is more of a racing oil and MTL is more of a street/daily...

I recently purchased a 1999 Toyota 4Runner with over 200,000 miles, I'm in the process of changing all the fluids. I an wondering if I should stick with conventional differential oil or switch to a group V ester-based oil like Redline to keep it leak-free. I have read that ester-based oils swell...