Last weekend - both vehicles were bought used with about 21,000 miles.
2011 Lexus HS250h with 30,000 miles - drain and fill hybrid transaxle with 4 quarts Toyota WS. Shocked that this stuff is now $12.00 a quart at my local dealer. Stuck with WS as I heard the hybrid transaxle had electric motors in it and was more particular about fluid. Any comments or experience with other fluids?
2010 Lexus RX350 AWD with 37,000 - 2 cold drain and fills with Mag 1 low viscosity multi vehicle synthetic ATF. I was able to drain about 2 quarts each time. Drove it around in between and did the second one the next day. Shifts great, maybe a bit smoother than before. According to the percentage spreadsheet I have about 3.58 quarts new ATF and 5.92 quarts old ATF. It was so easy to do I may do another drain and fill at the next oil change in a few months.
My (former) 2008 MINI Cooper S had a 6 speed Aisin automatic in which I did the same cold drain and fill procedure with the overflow plug removed. However MINI did not put in a fill plug, Someone at the MINI forum figured out which bolt allowed you to fill the tranny. However, it was so small it took 10-20 minutes to pour in one quart! Plus getting at that bolt was very difficult.