1996 Toyota Camry 3.0L V-6. 290,755 miles. Mobil-1 ATF. The transmission has a factory drain plug. I did one fluid transfer through the cooler line, at about 135K. Before then, 2 or 3 pan drains. Since the fluid transfer, it's had pan drains every other engine oil change (averages 12-15,000 miles). I bought this old car new and it has been operated its entire life in one of the dustiest environments in the U.S.A. Despite the dirt roads, heat & dust, it shifts seamlessly and is as smooth as it was the day I drove it off the lot. These vintage Toyota engines and transmissions are called, 'bulletproof,' and I believe it!