Review on zMAX 51-306 Transmission Formula: Reduce 🚗 Carbon Build-Up, Improve Shifting Performance - 6 oz by Marcus Braunstein

I have purchased zMax Transmission Formula twice for my Buick Enclave and it seems to be working great. Anyone familiar with Enclaves knows that the 1st generation models suffered from many premature transmission problems. like 80000km. I first tried it about a year ago, just before a 2 day trip, and the shifting seemed smoother with better grip and movement. After almost a year I put another bottle in to keep it in good condition. It seems to help. So far 110,000 km driven without problems. knock on wood!