Do it myself. A major auto parts store often has $10 off of the 5quart+ jug of mobile 1 on their facebook page or a coupon for a set price of $24. So when I see the coupon I print a few and buy a few jugs. It works out for me because I use the Mobile 1 high mileage and it is normally a few dollars more than the regular mobile 1. I only use an AC filter. I like getting under the truck so I can look for anything odd like leaks.