and amsoil is 9$ a quart...or i could buy 5 qts of QS synthetic for 17$ at china mart (torque)...my next oil change will be reg QS at 2.10 a quart and it will still go 7500 miles...if i had to spend 65$ on a oil change it better go 20k...i have never gone longer than 8k with any oil, Mobil 1 included...i dont think mechanics look at uoa"s too often