I purchased a used 2006 Acura TSX with a manual transmission back in 2010 so I can commute to work. Since then, I have been very tardy at changing the MTF, which I should regularly (every 50 - 100K km) to promote longevity and butter-smooth gear shifts. After more than a decade of ownership, this is my first attempt at replacing it with a mixture of MTFs manufactured by Genuine Honda and Royal Purple Synchromax - yes, you can mix brands.