I got 31 mpg (mixed highway/city driving) on my most recent tank of gas. That's great since the weather is getting hot and I'm having to use the A/C during the day.

I usually drive 65 on the highway, and use the cruise control whenever possible. I drive 60 on the way home from work, because there's no reason to be in a rush. On long road trips out of state, I'll usually set the cruise at 70.

I'm VERY pleased with the gas mileage.

 

I've got 443 miles, but only 23.9 mpg!

 

Clear each entry on the DIC and let it start computing from zero again. Time spent idling also eats into the avg mpg displayed on the DIC.

 

Hi All, From DAY 1 for 2 months i did only Highways,23 miles to work and 23 home I drove 70 MPH and the first tank I only averaged about 24-26 on the HWY MPG,my 2nd tank it incresed to 26-30 HWY MPG and so on! Now I can get UP TO 38 MPH at 80 MPH but on the average 33.7MPG HWY and up to 28MPG city if I have the air on I can lose up to 2MPG either way,I'LL TAKE IT!! I JUMP for JOY whenever i drive my HHR!
BTW: Regular gas/K and N Air Filter and Applyied PROLONGED Engine Treatment for the engine!

 

I'm at 681 miles so far.....I zero'd out the DIC today and got up to 34.00 MPG (highway)

 

I drove 414 miles to Lima ,oh from Flatwoods ,ky and back to a car show.I averaged 38.9 mpg on my 2006 hhr 5spd ,lowered with custom exhaust.

I got an average of 29 mpg to panama city beach ,florida pulling a 4x8 trailer.

I have almost 60000 miles on my cars and I have owned it since sept.05

 

I have 6k on my 2.4 2007 and can't get 25mpg. I avg. 31 mph in country back road driving. I am disappointed.

 

today I filled up and reset the DIC and drove about 20 miles. The gage showed 38MPG when I reached my destination!! It usually is around 24. Do you think a full tank gives you better MPG than a half empty or low tank?????

 

Maybe lowering the HHR is the ticket. How many with the lowering kit can get over 30 mpg. I know I can't without it lowered no matter if it's winter or summer, A/C on or not.

 

I've found just the opposite to be true.

When I used to clear the MPG entry after every fill-up, it would consistently be off by up to two full MPG.

I never reset it anymore, and it is now only about 3/10 off. Huge improvement.

And you do NOT want to clear all entries on the DIC. Leave the oil-life entry alone.