Why so low mileage?

Asked by REGMAR480 Feb 20, 2023 at 05:14 PM about the 2006 Mercury Montego Premier

Question type: General

MY MERCURY MONTEGO 2006 - 74 MILES- REGULAR OIL AN AIR FILTER
CHANGE, ALMOST MINT.
Why is making only 15.5 miles per galon in town?

1 Answer

307,225

Back then I ran across a few of these that had the wrong plugs from the factory, most were caught during the warranty period. So check the spark plugs and make sure they match the sticker under the hood or in the owners manual, the next thing to check is the sensor data, if even one is sending a false signal it could cause the engine to run rich. Remember E10 fuel will not get the fuel mileage the mileage sticker says you will get.

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