dodge durango, bad gas mileage.

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Originally Posted by s1ngletracker

Did they check to see if the injectors were stuck open?

+1

Very common for those Durango's to have injector issues

Originally Posted by goodhart

I bet it's the 02 sensor. My Dad's old 99 Ram had one go to shit on him and all of the sudden he was getting 2-3 mpg. My money is on the 02 sensor.

The downstream sensor is only there to monitor that the cat is doing it's job. Only the upstream sensors should have bearing on the fuel mixture