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HHR Real World MPG Numbers

PFFlyer@EdmundsPFFlyer@Edmunds Pennsylvania Furnace, PAPosts: 5,808
Fuel economy is becoming increasingly important. What kind of mileage are you getting out of your HHR in the real world?


Moderator - Hatchbacks & Hybrid Vehicles



  • ray80ray80 Posts: 1,186
    With the lack of real winter temps here in the northeast for the last month or so, my D.I.C indicated MPG is back up to 30.8. If the long range forcasts hold true, I expect that will drop a bit over the next couple weeks ;)
  • Ray80,

    I keep track of every gallon that I put in my cars on an Excel spreadsheet and on my past two GM minivans I find that the fuel economy display is off an average of 7.5 %. When it says that I am getting 22.5, I am only getting a little over 20mpg. You might want to keep track for several fillups and take a running average and compare it to your readout.
    Good luck,

  • ray80ray80 Posts: 1,186
    Thats why I always try to mention it if I'm using puters numbers. The one time (and only one tankful) I calulated using real numbers with the HHR it came out exactly the same as D.I.C. display, but thats not reliable. OH BTW cool air returned this week, and indeed indicated milage dropped a couple tenths
  • smogdungsmogdung Posts: 349
    Best tank was 27.3, worst was 25.0...typical = put 407 miles on a tank...filled up as full as I could ...15.1 gal = 26.8 mpg.
  • Ray, Euphorbia, et al,

    This jibes with the experience I have with the DIC. I reset the thing every time I fill up and when I do the calculations I generally see actual mileage a couple MPG under the DIC. In town I am getting 25-26 mpg actual, but you should understand I don't drive during the congested part of the day and spend little time sitting at lights, etc. (I actually just walk to work.) In pure highway driving, on mostly level interstates at 65 mph in fair weather, I actually get 34 mpg actual, which sort of boggled my mind the first time. I didn't believe it until it came out that way three times in a row in round trips to Hot Springs, AR. My daughter doesn't get but 30 in the same vehicle, OTOH she's 28 and I'm 52, I am sort of easy on the pedal.

    in New Orleans
  • Replying to myself, I forgot to mention I have the 2.2 liter and a manual transmission.

    in New Orleans
  • smogdungsmogdung Posts: 349
    I also have a 2003 Olds (weighs about 2800-2900lbs) 2.2L ecotech with 5 speed....after 52,000 miles I can say I've ave. right at 31 mpg overall. The 2.4L in the HHR feels.... more sophisticated....smoother...
  • geemacgeemac Posts: 28
    According tothe D.I.C. I am getting a consistent 28.5 - 28.8 MPG combined.
  • pacermanpacerman Posts: 62
    Hi, just might be helpfull to state 2.2 or 2.4 and A or M in the MPG posts. :)
  • PFFlyer@EdmundsPFFlyer@Edmunds Pennsylvania Furnace, PAPosts: 5,808
    Very true pacerman! A most definite consideration when evaluating mileage performance!


    Moderator - Hatchbacks & Hybrid Vehicles

  • basiliskstbasiliskst Posts: 55
    We rented a 2.5 liter automatic HHR LT2 for a recent 600 mile road trip. Over Interstate Highways with sustained speeds of approximately 72-75 mph we achieved 30 mpg, calculated by hand (if our HHR had a trip computer we didn't find it in the radio menu structure). Outside temperatures were in the high 90s and low 100s, so we were definitely using air conditioning. The car was fully loaded with luggage and three adults. I thought this was very good. The HHR was very smooth and generally quiet especially for a wagon or hatchback.
  • pacermanpacerman Posts: 62
    Just curious to the grade of fuel you were using in the 2.4?Thats pretty darn good mileage. :)
  • basiliskstbasiliskst Posts: 55
    Pacerman asked what fuel grade we used to achieve 30 mpg on a fully loaded 600 mile freeway trip. The first half of the trip was with 89 octane 10% ethanol 90% gasoline. The second half of the trip was with 87 octane regular gasoline. The fuel mileage was a combined mileage calculation (diminishing the effects of single fill differences).

    I used the cruise control. The 2.4 with automatic would kick down a gear on long hills (with a definite resulting notch up in drive train noise), but it was never short on power and when cruising in fourth the engine was notably quiet. Overall there was very little tire or wind noise, especially for a hatchback or small car. By contrast I recently drove a Dodge Caliber that transmitted much more tire and road noise into the cabin.

    I was also impressed with the HHR's on center feel and tracking. It was very easy to drive long distance with no wandering or uncertainty through the wheel. A recent trip in an otherwise beautiful Toyota Corolla was marred by steering that always felt like it was trying to find the groove and never did. I wouldn't want to live with the Corolla's wandering ways. It's possible the Corolla (another rental) wasn't representative, but I've driven three different HHR's and all illustrated how it should be done. Maybe the relatively long wheelbase helps the HHR. That said the HHR is a cruiser, it is not set-up for sports car agility. The HHR rewards smooth driving not cut and thrust.
  • micwebmicweb Posts: 1,617
    Very helpful comments, thanks, I think I'll switch to the HHR when I'm ready to trade in my PT.
  • cmarlercmarler Posts: 1
    My husband has always used Lucas gas additive for our vehicles, which were always used when we bought them. We bought a 2006 HHR and he still insists on using it. My question is, is it safe and also helpful to a new car or will it do more harm than good?
  • dancermandancerman Posts: 220
    They make a good product. Use as directed.
  • paopao Posts: 1,867
    use a good quality tier one level gasoline....chevron is is another.....and you shouldnt need any additives.....

    additives usually needed to clean injectors and the like.......
  • bjw57bjw57 Posts: 1
    Just purchased an HHR with 2.2 manual, just put the third tank of gas in , regular 89 octain. First tank was little over 30 mpg, 50% hiway, 50% town. Second was 26.8 mostly in town, I think computer said average speed on that tank was 32 mph.
    Last tank was 28.6 that 60% around town and 40%highway.
    I have been driving with a soft touch. I figured these calc. by hand,, seems like the computer is just a little off...
    I will keep posting as I will be putting lots of miles on the vehicale in the near future.
    If you have any questions ..just ask!
  • micwebmicweb Posts: 1,617
    My computer on my Cobalt seems optimistic by 1.5 mpg, based on calculating mileage with a calculator (write down miles per tank on each gas receipt) over about 4,400 miles. But its consistent, and moves in the same direction as actual gas mileage.

    My best indicated/calulated mpg to date (stickshift 2.2 Cobalt Coupe LS) is 39.1 mpg, my worst 32 mpg, with average commuting mileage between 33-34 and average road trip mileage between 34-36. (A combination of an easy, long freeway, commute and easy driving habits and a stickshift). This clearly beats my former all time mileage highs of 33 mpg on my commute.

    Your HHR mileage is much better than my automatic '06 PT which gets 23-24 on my commute and 23.5-24.5 on road trips.
  • There are no 2.5L HHRs.

    After 10,000 miles I have zero complaints with my 2LT Automatic.....runs with no ping on 87...seems to have more power with 91....ave @ 27 mpg. Love the handling with the 17s.
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