I use synthetic oil in my 08 Highlander and have been doing my oil changes at 5k with Walmart Super Tech oil since new (45K current mileage with 0 problems). What oil filters do you guys use? Fram CH9972 is supposed to be the same as Toyota 04152-YZZA which is the OEM number. I have used Fram XG9972 in the past which is supposed to be good up until 15K but under the circumstances and the extra price I was wondering if it is a waste of money and overkill.