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  1. Smooth shifts: Amsoil MTF vs. Redline 70w80 vs. Motorcraft XT-M5-QS?

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    On my Acura I ran GM syncromesh FM. Very smooth shifting. Looking for similar shift feel on the m3. Not going to track the car, just spirited DD. I don't abuse my syncros, double clutch, and live in a temperate climate. What MT oil does everyone recommend on the m3 for smooth shifting...
  2. Anyone switched to Ford XT-M5-QS Full Synthetic Manual Transmission Fluid ?

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    Anyone 2014 M3 switched to Ford XT-M5-QS Full Synthetic Manual Transmission Fluid ? After 20,000 miles, mile 6 speed manual still has little bit of grind going to 2nd gear and going to 5th gear even after adjusting as shown on TSB. It seems that the Ford XT-M5-QS Full Synthetic Manual...
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