I went to buy some Mobile 1 75W90 for the transmission on my 2006 Heritage Classic last night. I found one that was just less than $10. Beside it was one for $17.95 that said it was for SUV. I assume the $10 is what I should use, but then thought maybe the SUV oil would hold up to the heat better. Any advice would be appreciated. This is my first experience changing the transmission oil.