Originally Posted By: philipp10
quote:The spirit of contrarianism runs very deep here. And the contrast between oil and ATF approaches is even more contrarian. The oil guys are pushing their OCI well past the recommendations of the manufacturer with good success. While the ATF guys are just the opposite and changing out their ATF well before the recommendations of the manufacturer. quote"
And I have to wonder why? I am sure there are many, many test reports that show the lifetime fluids are in fact, lifetime. They are stored in the labs of Toyota.
The endpoint isn't the fluid itself, the endpoint is the transmission's serviceable life. We all know that a transmission, no matter how often you service it, will have a finite life. If Toyota's data shows the changing out the tranny fluid has no effect on the longevity of the transmission, then it's a lifetime fluid. Because there's no benefit to change the fluid.