I just exchanged the fluid on my 01 Mercury Sable. The old Mercon V fluid saw 45K. The old fluid didn't look that bad and I'm guessing it could have gone longer.
There is 95K on the odometer. This was the third change for the vehicle. I do complete exchanges, not partial.
1966 AMC Rambler Rouge, 4BBL 401 V8, 4 SPD manual, RWD
Not a change, but added just over a quart of Lubriguard 80W-90 to the transmission
This car had a fine running 290 V8. The owner, our customer and friend had to have a 401. So, now it has a 401 out of a '75 Jeep shoehorned under the hood.
Apparently I slacked on my ATF fluid as it's been roughly 60k since my last change. Time flies and it felt like I just had the three drain/refill. Not sure what the change interval of old Honda Z1 was but yeah...60k on Z1 out. Still had a good red color to it.
No clue about the old fluid, but it was dark and there was a lot of metal sludge on the magnet. Flipped the crush washer around and used it again. Takes 3 qts of Honda DW1 and got a new dipstick too.