Hey BITOG,
I have always been interested in "lifetime" transmission fluid fills. I think they are bogus. I spent some time as a quality engineer in an AT plant and I became even more convinced that they are bogus. At any rate, I purchased a 2014 Mazda 6 in late 2019 with 208k miles on it and it was on the factory ATF fill. The shift quality and health of the AT was the biggest thing that made me reconsider this car after the test drive. The shift quality was poor with some shifts being delayed then harsh. I ended up purchasing the car anyway because the deal was just too good to pass up. One of the first things on the to-do list was was to get that old fluid out and get a sample off to Blackstone. The results of that sample are below.
Since replacing the ATF (4x drain and fills) the shift quality is improved to what I would expect a new vehicle to feel like. Now at 228k miles, I still am very satisfied with this transmission.
I have always been interested in "lifetime" transmission fluid fills. I think they are bogus. I spent some time as a quality engineer in an AT plant and I became even more convinced that they are bogus. At any rate, I purchased a 2014 Mazda 6 in late 2019 with 208k miles on it and it was on the factory ATF fill. The shift quality and health of the AT was the biggest thing that made me reconsider this car after the test drive. The shift quality was poor with some shifts being delayed then harsh. I ended up purchasing the car anyway because the deal was just too good to pass up. One of the first things on the to-do list was was to get that old fluid out and get a sample off to Blackstone. The results of that sample are below.
Since replacing the ATF (4x drain and fills) the shift quality is improved to what I would expect a new vehicle to feel like. Now at 228k miles, I still am very satisfied with this transmission.