Well guys, I know lots of you have higher-mileage engines, and I thought yall might like to know abt this... I have about 26k miles on my Highlander, and change the oil every 2.5-3k miles... two days ago I added Valvoline Synpower Complete Fuel Cleaning System or something like that into my gas tank and
it actually makes a difference! Car idles smoother, takes off much smoother, etc... def worth the few bucks!