Yes I agree with you about the 15k interval for changing the fluid, however the Lexus manual or dealerships years ago did not recommend this interval. They have changed their policy unofficially, due to the failure rate when changing the fluid by their old recommendation. I wish you only good luck with your cars, and I do love mine, except I am still upset with Lexus of America for never standing behind their product on the tranny failures. Sad, because otherwise the car is great. I changed my fluid every 30k and it still failed, now I change it every 15k or sooner....there is a design problem, and it is acellerated when the car is driven in heavy city commutes. Seems the highway miles are more gentle on the tranny as it is not constantly searching for overdrive. My friend has the same car, but she drives mostly freeway speeds and hers didnt fail until 180k miles....unfortunately my wifes is driven on city streets for her commute daily..Now I tell her to turn overdrive off, to stop the searching.....Good luck everyone...