- Gas Mileage
- Gas Mileage & weather
- New forum section - Fuel Economy - Hypermiling
- My "hypermiling" techniques
- Hydrogen
- 08' Mpg Verification
- Commuting choices
- Saving a bit of gas
- What tire pressure are you running?
- Absurd Mileage!
- tires
- Gave it a try today!
- Not exactly "Hyper-milling"
- MPG update -> After PCM tuning
- Project absurd mileage completed!
- Real World MPG improvements
- Scangaugeii Mount Location?
- Interesting article in Dallas Morning News
- MPG lower than others listed
- Mileage mods and strange results
- acetone?
- Aerodynamic
- How does ethanol effect octane rating
- ultimate speed for efficiency?
- Crappy gas mileage in town / Incredible Highway
- Bosh/STP AutoZone coupons, good 'til 1/15/09 (plugs/wires/air filter)
- 37 MPG @ 60 mph
- Mileage run
- Winter wheel/tire combo mpg
- How many miles
- RPMs and Auto Trans
- BAD winter mileage
- Milage tidbits
- Instant MPG?
- Pure Gas, No Ethanol
- 85 octane gasoline in Colorado. Void warranty?
- manual hhr?
- 31.69 mpg with 93 octane
- Mixing 87 and 93 Octane?
- my mpg has been going down alot
- 34.0 - 36.8 Avg Mileage
- Hhr xfe?
- So Maybe My MPG Isn't That Bad...
- GM Fuel System Cleaner
- Milage
- coasting
- Share your MPG with other HHR owners
- Gas milage accuracy?
- These vehicles are able to top 40 mpg!!
- 87 or 91 on a 2006 HRH LT
- My take on getting better MPG
- High Fuel Range
- HHR - An Aerodynamic Brick?
- Tall tales and fish stories....
- Adding 2-Stroke Oil to Gasonline?
- Fuel Injector Cleaning
- Tornado vs k&n
- Enjoying my gas mileage!
- E10 vs. E85
- Does anybody else's mpg drop when it gets cold?
- My Gas Milage
- MPG in a 2.4
- MPG versus Final Drive Gear Ratio
- GM was totally wrong on our economy
- Air Filter / MPG improvments ?
- Instant MPG Questions
- MPG on 2.0 Vs 2.4
- Ethanol Free Gas Stations List by State
- Is The Woolly Worm Needed?
- Can I used E-87 Ethanol
- MPG Trifecta Tune?
- Fuel economy has diminished.