Sorry, but I'd like to understand the reason for the "cheap" type F. I know that nearly all transmission fluid complies with a standard so the brand matters little. But I'm curious.

I know there is Type F, Mercon III to V and maybe VI. There is synthetic such as Mobil I and Transynd for Allison transmissions. I'm pretty sure the synthetics take heat a lot better.

Do you you use Type F because you change it so often?