I've had mixed results with redline mt85. It was great when I put it in (spring), no issues that coming winter. The following winter after ~8K miles however, shifting in the cold was very difficult. Temps in chicago fluctuate greatly in the winter.
The first 5-10 minutes of operation when near freezing temps (32F), shifting was very difficult. In fact, I had to go 1-3 until the car warmed up. Double clutching didn't help either.
In the middle of january I switched back to the OE nissan fluid. Shifting problems disappeared. Being a high performance synthetic fluid I would of expected it to last longer than 8K. We'll see how the nissan fluid does this winter.
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G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring
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