Hello,
I knows, i have good mechanic.
What mechanic was telling, if you getting 28 mpg on freeway, changing O2, don’t make
any different in gas mileage. And when it’s go bad, you will see light on dash board.
front two effects gas, but increase 2mpg, do you like to spent $300?
so, let me ask with 97 model and 177,000 miles do i need to change O2 sensor?
and how much mpg will increase?