2000 Sable-Gas Mileage Discussion
I have a '00 Sable with the Duratec 24v engine, 68K on the clock. We primarily drive highway trips and never have we experienced better than 26 mpg. It doesn't seem to make any difference if we drive interstate at 65 mph or 2-lane roads at 55 mph. I've talked to a number of people with the same car that claim to average 30-32 mpg on the highway with this engine.
My suspicion is maybe a faulty coolant temp regulator; dirty mass airflow sensor, or maybe a bad or dirty connection to my mass airflow sensor. If not, maybe fuel pressure regulator (pressure too high).
Does anyone have experience, suggestions, and comments to share?