- Fuel line repair
- 2009 flex fuel question
- I don't think e85 is worth it
- Oxygen Sensors Help
- Fuel range change decrease /increase
- Anyone else notice decreased MPG with vehicle age
- Is it possible to buy more fuel at current price?
- car dash mileage vs Real mileage
- Think Thin: GF-6 Latest Spec in Engine Oil
- Grille mods, self made - to cut drag, boost engine temps
- Do U use any type of fuel injector cleaners?
- 5-speed from Cobalt XFE in HHR?
- Sputtering flow of air from tailpipe w/ idel
- Help with lousy fuel economy.
- what grade of gas is everyone running?
- E85 for better performance with A/C running?
- Does synthetic oil improve fuel economy?
- Trans problem
- At what speed does the HHR start to get poor mileage?
- E85 performance
- Anyone running E85 ?
- Fuel pressure regulator replacement
- Seeking links/recommendations for max airflow
- Hot air intake?
- Try this Mileage test.
- More MPG info...
- Help with horrible mpg 15-16mpg only
- How much?
- O2 sensor extension
- Just filled up.... need someone to compare
- Better Air Intake Setup?
- 200 miles to a tank gas ???
- Graph of stock torque curve
- MAF Sensor
- Fuel and oil system to be maintained ?
- 18x8 wheel mpg performance
- Pulse and Glide, Switching to Neutral
- Octane Boosters or not?
- Whats your gas mileage on your HHR
- Best Mileage Oil?
- MPG Tune?
- Brand of fuel you use
- MPG improvement modifications 2009 HHR
- Fitch Fuel Catalyst?
- New owner, great mileage
- Fuel mileage test round 2
- 2008 2.4 lifetime mileage
- First mileage test
- Gas Mileage Test: Tire Weight
- air intake fan?
- DIC fuel mileage accuracy?
- Fuel Escort
- My first real mileage check...
- Madison WI to Reno Nv
- H2OIL Fuel economy
- How long since the last Premium fuel vs Regular fuel question?
- 2.2 vs 2.4..and other help
- CNG, Auto-Gaz Centrum, sequential (multi-port) injection system
- Possible mpg loss due to grille?
- CNG Compressed Natural Gas
- Poor economy
- ? about mileage
- DIC Gas Readout
- Look what I got / did!
- Laughing about the DIC (fuel range)
- FuelLog for Android
- Longer Trip (For me) - HHR SS
- Tune for better mpg?
- MPG in my New (to me) HHR
- How accurate is the MPG detector computer thing?
- GForces chips
- Long road trip and hoping to get 500 miles per tank
- INST gear vs. Cruise Control MPG efficiency
- End of ethanol subsidy
- Tried some hyper miling on the way to work today.
- low fuel on dic
- Doing ok in my HHR so far
- 626.4 miles on one tank!
- Ethanol - Will it go up?
- Anyone ran taller tires?
- MPG 2.4 vs 400hp Vette
- Convert FROM E85
- E15 gas, is it coming near you ?
- Best of 25+ mpg so far (2.2/auto). I want better!
- Gas Mileage changes 2006-11?
- Ethanol fuel
- Gas mileage
- interesting fact
- Hypermiling
- hhr fuel economy
- edcaravan | poor gas milage in the winter ?
- Topping Off
- locking gas cap for an 07 hhr
- why would my gas mileage drop
- K&N FIPK vs Stock Airbox Mileage
- Gas Mileage at 60 MPH?
- K&N Cold Air Intake
- Premium fuel v. Regular Unleaded
- 49 MPG with a 2010 HHR LT2?
- finally getting good mpg in the 2.2
- E85 Fuel Economy
- Got to love that HHR MPG
- 2007 Gas Mileage
- Fuel economy has diminished.
- MPG Trifecta Tune?
- Can I used E-87 Ethanol
- Is The Woolly Worm Needed?
- Ethanol Free Gas Stations List by State
- MPG on 2.0 Vs 2.4
- Instant MPG Questions
- Air Filter / MPG improvments ?
- GM was totally wrong on our economy
- MPG versus Final Drive Gear Ratio
- MPG in a 2.4
- My Gas Milage
- Does anybody else's mpg drop when it gets cold?
- E10 vs. E85
- Enjoying my gas mileage!
- Tornado vs k&n
- Fuel Injector Cleaning
- Adding 2-Stroke Oil to Gasonline?
- Tall tales and fish stories....
- HHR - An Aerodynamic Brick?
- High Fuel Range
- My take on getting better MPG
- 87 or 91 on a 2006 HRH LT
- These vehicles are able to top 40 mpg!!
- Gas milage accuracy?
- Share your MPG with other HHR owners
- coasting
- Milage
- GM Fuel System Cleaner
- So Maybe My MPG Isn't That Bad...
- Hhr xfe?
- 34.0 - 36.8 Avg Mileage
- my mpg has been going down alot
- Mixing 87 and 93 Octane?
- 31.69 mpg with 93 octane
- manual hhr?
- 85 octane gasoline in Colorado. Void warranty?
- Pure Gas, No Ethanol
- Instant MPG?
- Milage tidbits
- A Picture of My MPG
- BAD winter mileage
- RPMs and Auto Trans
- How many miles
- Winter wheel/tire combo mpg
- Mileage run
- 37 MPG @ 60 mph
- Bosh/STP AutoZone coupons, good 'til 1/15/09 (plugs/wires/air filter)
- Crappy gas mileage in town / Incredible Highway
- ultimate speed for efficiency?
- How does ethanol effect octane rating
- Aerodynamic
- acetone?
- Mileage mods and strange results
- MPG lower than others listed
- Interesting article in Dallas Morning News
- Scangaugeii Mount Location?
- Real World MPG improvements
- Project absurd mileage completed!
- MPG update -> After PCM tuning
- Not exactly "Hyper-milling"
- Gave it a try today!
- tires
- Absurd Mileage!
- What tire pressure are you running?
- Saving a bit of gas
- Commuting choices
- 08' Mpg Verification
- Hydrogen
- My "hypermiling" techniques
- New forum section - Fuel Economy - Hypermiling
- Mods to improve mpg?
- Gas Mileage & weather
- Gas Mileage
- Gas saving ideas from Edmonds!