I got a car with 115k miles on it and i only get about 160 miles per tank. IT is ticking me off because that is nothing. I do well on the highway but i never really go on the highway. Im assuming i have the original o2s. I am getting 12.5 daily driving now. What do you think my economy will be after changing them. Wanna see if it's worth it.

Can anyone post their before and after mpg w/ new acdelco o2s.

 

If there original and you have 115k on them, you might as well change them out anyway. I'm sure it will be of some improvement. What about other tune up items? Have you done anything else? Plugs, wires, opti, fuel filter, air filter? They will all eat into your mileage if their due for a change. Also, what about your tire pressure? At the right pressure? Just some suggestions...

Ken R.

 

Ive tuned up every filter, fluid, pcv valve, plug wires, plugs, etc. Haven't done opti, havent done o2s.