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Declining Gas Mileage Numbers


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Model SE, has about 60500 miles on it (had 34k when I bought it in 2016). I've typically gotten 42-48 mpg (prior owner did not), combination of city/hwy (best I got on a tank was 57 I think) and you can see I don't drive a LOT. Mostly in town but have taken several road trips of 1000+ miles. It already bothered me not to be driving an EV or at least a PHEV but now....I haven't changed my driving habits or destinations and now I get 32-37 mpg. I am not happy about this. I don't detect that the engine comes on more often than it ever has, but I might be clued out. Do others experience lower fuel efficiency after 55000 miles or nine years? Or both ...

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Colder weather? This started many months ago....and I don't use the heater. I've had the car a long time, through other "colder weather." And as I said, driving habits the same -- definitely not "driving higher freeway speeds," of course I know what happens at 70 mph....my question was "Do others experience ..."

Edited by bad decision
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My 2013 SEL Hybrid with about 70k after 10 years averaged about 40mpg in the winter and about 50mpg in the summer.

That is using the seat  heaters and heater after the engine warms up.  Lifetime was 45mpg.

Using the ICE going up hills and electric on flat lands and down hill when possible.

But it doesn't get super cold here normally in PNW.

Didn't notice any drop off in mpgs.

Edited by homestead
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2013 SEL, 190k here, Average between 40 to 43 mpg depending on outside temps mostly, majority of driving is highway at an average of 55 to 65mph. Did average a bit more [1-2mpg] prior to my last tire replacement. Gas mileage is hit by many different factors. I would look into the tires & pressures they are set at [some tire techs will not check for correct PSI]. You may want to swap out the air filter & plugs earlier than the manual calls for. Thanks for the read.

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