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gas mileage gone

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Old 06-17-2010, 09:27 AM
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gas mileage gone
Dealer replaced the head under warranty, and now the gas mileage has totally taken a hit. Dropped from 34 hwy to about 28.

Any thoughts?
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Old 06-17-2010, 10:14 AM
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Just to make sure you're comparing apples to apples, have you been running A/C lately where you weren't before? Are you cruising at the same speed?
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Old 06-17-2010, 02:26 PM
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Are you measuring at the gas pump, or just looking at the displayed average on the dash? It can be deceptive if it has been reset recently.
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Old 06-17-2010, 07:11 PM
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Best way to calculate AVG mpg is by miles driven/gallon tank.
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