Wow, 22 gallons per mile, that is alot!
If you are thinking you should be able to match the EPA sticker
figures, few people do. You are driving a vehicle with the
aerodynamics of a brick after all.
My truck matches the EPA sticker, but after owning a minivan I noticed they
rarely match, you have to drive with the Ac off, tires above 35psi, windows
up/closed, on perfectly flat ground to even get close. Any hills, use of
Ac or windows down will drop it.
My Venture gets an average of 24 MPG however on a trip at 65 MPH it gets
26-27 MPG with the air conditioning on, that's as long as we don't do much
stopping. I don't think it does too bad considering it is a 8 passenger
Just to mention a couple of low tech thoughts on the matter. Be sure
you are not carrying a lot of extra junk to weight the vehicle down.
Remove all that you don't need. And make sure your brakes are not
dragging. Put the vehicle in neutral at about 5mph on level ground and
see if it coasts freely. You could perfect your driving techniques to
improve mileage. Time the lights. Coast up to a red light instead of
driving right up to it like many do. If your brakes are not lasting a
long time that's a sign of not driving for mileage too.
I think the EPA tests are done on gas and you are probably running on a
mixture of gas and alcohol, which gives less mileage.
If you are trying to equal the rating on the sticker, remember those
figures are determined with ALL accessories turned off--no ac, no radio, no
heater(in July??), and probably with a fully-charged battery just before the
test-drive. Plus, as others have indicated, different driving habits
reflect different gas mileage. s
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