Originally Posted by ww50th

Well, thank you all for the replys. I must admit that I should know better than to post anything about any oil subject on any automotive forum. I belong to many forums as I have had, and still have, a variety of vehicles. Lexus RX330, 2008 GS460, C6-Z06, 2005 SSR, 34Chevy street rod. Any oil subject brings out fanatical replys on any forum. My basic question was on the frequency of change, as the owners manual, that I have read, doesn't request you to replace the transmission fluid. To support this position, the transmission dip stick is placarded to tell you the same thing! " It is not required to replace the ATF unless this vehicle is operated under extreame conditions". I was looking for any information from individuals that had followed this advice and had adverse results. IE I followed the owners manual recomendations and under light driving conditions had a transmission failure. Old habits are indeed very hard to break, however, if you drive your vehicle 12,000 miles per year under very light conditions and you change your oil 4 times, you are surely wasting your money, regardless of what type of oil or filter you are using.