Oh yeah. The service Mr said it and I thought I was hearing wrong. So I asked him to repeat what he said. Direct quote from him "we just use dex vi... dex vi is dex vi". I have used both M 1 and wolf's head synthetic with no problems in 175000 miles. I change every 35000 miles. Trans works like brand new. I change 3 time (at once) running the warm Trans 15 minutes shifting through all the gear. While up on jack stands. Drain and repeat 3 times approx 15 qts. Total

I also change the filter every other time.

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2002 BMW X5 3.0
2006 Ford Explorer 6 cyl
1998 VW Jetta 2.0 GLS
2004 Honda VTX1800C 100hp 97 lb of torque