Low gas miles

Asked by Mar 09, 2016 at 10:18 AM about the 2009 Chevrolet Cobalt LT1

Question type: Maintenance & Repair

First off, I love this website.  Anytime I have problems, someone here has
always given me a solution!

When I first got my car, it was getting almost 350 miles to a tank of gas.
Lately, I am lucky if I get 250.  I understand there is additives added to the
gas in New England to help prevent freezing in cold, that lower gas miles,
but this is ridiculous.
Somethings I have done to try and better gas miles were, replaced tires,
aligned the vehicle, replaced PCV hose, MAF sensor.
I have noticed the car runs at a higher RPM, especially at highway speeds.

So what I am asking is, what other things can I do to try and better my gas
miles, or find out why it is burning through so much gas.

2009 Chevrolet Cobalt - 144,000 miles.

3 Answers

5,055

the handbrake might be left on partially~

42,155

It is possible for some reason the transmission is slipping or not going into overdrive. That would explain the higher rpm noticed on the highway. It needs to go to a reputable mechanic for proper diagnosis.

3,785

What trouble codes came up when you had it scanned?

Your Answer

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