Hylander
Member
so when I google this, answers seem to be 60-90,000 miles or if you notice issues.
Truck has 118,000 miles, No codes, truck runs fine except bad gas mileage compared to others in my area.
Does upstream or down stream have the most effect?
Also what brand to get?
Truck has 118,000 miles, No codes, truck runs fine except bad gas mileage compared to others in my area.
Does upstream or down stream have the most effect?
Also what brand to get?