think that only for autos mostly... not sure though. ya after about 3 weeks or more im still grindin in 3rd n it pisses me off.... now i grind when im down at low revs when i shift out of 2nd at about 2800 rpm i shift into 3rd n i grind i feel it n it sucks..... i how baby it into 3rd give it about 5 seconds between shiftin 2nd into 3rd... it sucks. might buy some redline n just change the fluid again. wat pisses me off is that i bought the good kind of fluid that was like 9 bucks a bottle n it sucks n could had just bought redline for like 7 bucks a bottle and waited like a week to get it... but being the stubbern person i am i had to change the stock gear fluid now i feel like kicking myself. but on the positive side the mobile 1 is much better in teh cold than warmed up-_-