I would guess around 20-25 mpg.
Things that affect it are:
correct tire pressure,
a good thermostat so the engine warms up quickly.
O2 sensors operating correctly.
Clean air filter
no drag from the brakes
easy accelerations
avoid speed increases to just pass as opposed to cruising
proper gapped and clean spark plugs
long idling
long warm ups
bad alignment.
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Thursday, January 31st, 2008 AT 6:05 PM