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Ford Aerostar
Fuel Economy and Mileage
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Why would your MPG be lower after a full tune up?


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Wiki User
2005-09-15 19:19:21
2005-09-15 19:19:21

Could be the mechanic set the throttle control too high, so your car idles at a higher RPM than it used to. Timing was set wrong. your car should be better after a tune, perhaps the tuner made a mistake or did not do the tune correctly

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Drop in fuel mpg Drop in performance

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Yes, you can increase it with tune-ups and by upgrading the engine.

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EPA estimations are 18 MPG in cities and 28 MPG for highways. However, you can pretty safely expect slightly lower values in reality, around 15 MPG in cities and 23 MPG on highways. The overall MPG is slightly lower than the average compared to other V8 engines.

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Tune it up. If its A car you can hope for around 18 MPG If its A truck you can hope for around 14 MPG

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That depends on the engine, mostly. No matter which option, it wasn't good by today's standards. My 289 2bbl was around 10 mpg before I did a tune up. Now it gets 16 -18 mpg.


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