You should be getting great mileage. my 08 2LT Panel averages 30 mpg combined. All 2LT models have the 2.4 also..

 

Since starting my new job I've noticed an increase in my average m.p.g.I'm now driving more freeway during commuter hours (often at less than posted speeds)and my average has jumped almost one mile per gallon.The average is up over 29 m.p.g. now-very good,I say for a 2.4 5 speed that the government rates at 28 m.p.g. just for highway driving.

 

My 2010 2.2L HHR LS 5 speed manual gets great mileage, considering what I put it through. I take country roads to work since I don't want to pay toll on the Ohio Turnpike. There are long straights at 50-60 mph or so, however, there are numerous stop-go situations whenever I approach a stop light, train, or farm equipment.

I AVERAGE 31.5 mpg quite often on a tank of gas. The norm I see is 30.XX mpg.

On the highway, if you feather the throttle, accept velocity losses when climbing hills, utilize gravity when descending hills, and occasionally draft a truck now and again, my DIC is often in the very high 30s to mid 40s... consecutively.

You just have to know how to drive a car efficiently. Watch your flow meter in the DIC and adjust your throttle to at least halt a drop in MPG, or allow yourself to decelerate at a reasonable rate allowing you to conserve fuel on inclines. Also, sometimes, higher RPMs can yield you greater MPG if you can keep the centripetal acceleration on the flywheel neutral.

Its really a totally different way of driving than many people are used to. I can't wait to get my hands on a Geo Metro 3cyl and throw a Joe Cell on it... that's so damn exciting.

Here is a video I made and just uploaded. The road is flat... I'm not on a hill or anything.


2010 HHR LS
http://www.youtube.com/watch?v=mikyTbqqJUY

My last car, 2006 Cobalt SS/SC
http://www.youtube.com/watch?v=1icvXml-e9g