I have a 1997 Dodge Dakota V6 3.9l Engine|||i heard like 100miles but i think its way off|||Hmmm, probably not a lot... 1 mpg maybe.|||not much , maybe 1.5mpg|||i think it would but you would needto ask auto zone|||That depends upon how old and crapy your current O2 sensors are. Oxygen sensors can be expensive, and that would certainly outweigh the savings on gas, I would imagine. Sell the gas guzzler and get something more practical.|||The o2 sensors control fuel injection on a small scale. It will help if you need them. If your vehicle is bucking and running rough then you may need to change them. If your vehicle isn%26#039;t then it won%26#039;t change fuel consumption much. I got great results on my 97 dakota by changing the fuel injectors and fuel rail. Vehicle drove sweet after that.|||it depends on how bad it is.
if it is lazy it will effect fuel delievery.
dodge%26#039;s have not been known for their good gas milage, but if its got over 60k on it, then a new o2 sensor upstream will definately make a difference.
make sure you readapt the fuel memory.|||Check with your mechanic. most likely you need a good tune up. Replace your spark plug wires, they are made of carbon, and most likely have cracks. Now the oxygen sensors have more to do with pollution control, and how rich/lean the mix has to burn evenly until your truck warms up, or when you accelarate. I%26#039;d more worried about your valves and your fuel injectors, excessive carbon buildup and your valves will allow a rich mixture to escape before burning evenly. And dirty inkectors will cause some fuel to evaporate on the engine rather than in it. Look at these things first. they will be less costly and save a good deal of fuel.
