Gas Mileage
Senior Member
Joined: 12-30-2006
Posts: 1,141
From: Lake Conroe, Texas
More per gallon. But the station near my house that used to do that has stopped-probably noticed that he had fewer customers. Funny thing is he charges the same for full service that the station across the street charges for self serve, so I prefered to go there until he added for the credit card. Now I am back
Senior Member
Joined: 11-14-2007
Posts: 1,240
From: Planet Earth
New Jersey Turnpike.
Potomac, Maryland.
Bethesda, Maryland.
And in Potomac and Bethesda, you pay MORE for full service. They post it at the pumps and they have a sign. The people that live in those areas can afford it. I have never seen so many Bentleys in one place than Potomac, Maryland. The two door sports Bentley. Very sweet. But folks that live in Potomac, Maryland, start their winter fires by rolling up a $100 bill, lighting it on fire and throwing it in the fireplace. Sick man, very sick...
Potomac, Maryland.
Bethesda, Maryland.
And in Potomac and Bethesda, you pay MORE for full service. They post it at the pumps and they have a sign. The people that live in those areas can afford it. I have never seen so many Bentleys in one place than Potomac, Maryland. The two door sports Bentley. Very sweet. But folks that live in Potomac, Maryland, start their winter fires by rolling up a $100 bill, lighting it on fire and throwing it in the fireplace. Sick man, very sick...
Last edited by MWG2; Jan 6, 2008 at 05:44 PM. Reason: add some more info...
Senior Member
Joined: 09-11-2007
Posts: 1,379
From: Palm Bay, Florida
I did an unofficial gas milage study today with my 2.4L automatic HHR.
I drove over to central Florida on a flat stretch of road with a 55 mph speed limit. I set the cruise for 55, and over a 40 mile stretch I was getting (DIC Meter) 38 mpg. Coming back on the same road with cruise set at 60 mph the DIC said I was getting 33 mpg.
I'm not sure why the 5 mpg drop in gas milage with only a 5 mph increase in speed, but that is what DIC said.
I drove over to central Florida on a flat stretch of road with a 55 mph speed limit. I set the cruise for 55, and over a 40 mile stretch I was getting (DIC Meter) 38 mpg. Coming back on the same road with cruise set at 60 mph the DIC said I was getting 33 mpg.
I'm not sure why the 5 mpg drop in gas milage with only a 5 mph increase in speed, but that is what DIC said.
Joined: 12-08-2007
Posts: 6
From: Coachella CA
MY MPG are great for a few seconds
I check tire pressure frequently, I use fuel injector cleaners periodically, I installed a K&N air filter, I use premium gas, and I run red light’s to avoid burning gas while stopped. I get about 19mpg hardly any Highway miles. I know it sux but oh well ill figure out how to raise that number sooner than later. Also just for a unreal happy moment I love to reset the MPG DIC while in the middle of going 40-55 mph. I like to see it read 30+ MPG even if it only last until the next stop.
Senior Member
Joined: 11-20-2006
Posts: 931
From: Peoria, IL
I got only 21MPG on my recent highway trip 
.....
But I was towing my motorcycle, had the A/C on the whole way, terrible headwind on the way down and was driving through the smoky mountains for a good bit of the trip too
Not bad IMO. Oh and when towing, it drove much better with premium gas. I don't notice much of a difference normally between the grades but it really did seem to help when towing.
..... But I was towing my motorcycle, had the A/C on the whole way, terrible headwind on the way down and was driving through the smoky mountains for a good bit of the trip too
Not bad IMO. Oh and when towing, it drove much better with premium gas. I don't notice much of a difference normally between the grades but it really did seem to help when towing.
Senior Member
Joined: 04-11-2006
Posts: 166
From: Eufaula, Oklahoma
Gas Mileage
I didn't say full throttle and hard braking, I mentioned strong acceleration. More specifically you should accelerate hard but let off before hitting 75% of redline rpm which is around 4875 rpm keeping in mind the dash tach may be off by a couple hundred so let's say keep it below 4500 to be safe. Once 1000 miles are up, all bets are off and redline (6500) is fair game if you're so inclined. You want maximum cylinder pressure during break-in to seat the rings.
This can be accomplished by leaving stoplights or stop signs briskly, staying below 4500rpm as above and letting off once you're at or near the posted speed limit or 4500rpm whichever comes first.
This practice should only be engaged in when the oil temp is @ 180 or above.
This can be accomplished by leaving stoplights or stop signs briskly, staying below 4500rpm as above and letting off once you're at or near the posted speed limit or 4500rpm whichever comes first.
This practice should only be engaged in when the oil temp is @ 180 or above.
For the last three weeks the wind has blown so hard that I was getting 43 MPG down wind, 24 MPG up wind @ 65 MPH. Now have over 40K. . Not broke in yet !! Still runs strong
Last edited by moose-e-man; Jun 16, 2008 at 07:47 AM. Reason: addition of text
Senior Member
Joined: 06-14-2008
Posts: 96
From: Minnesota
This week sometime, I will be picking up 08 HHR 2.4 auto, I will use this thread to post my MPG as they rack up. From what I have been reading, I will use the DIC and also check by hand, and post any variances.
Senior Member
Joined: 03-31-2008
Posts: 772
From: CLEVELAND
What speed do you run on the freeway? The Ecotec's maximum fuel efficiency, I've found, hits right around 65mph. Any slower or faster and economy suffers. With the HHR if you have no lowering suspension, it also helps to have some weight in the back end, weighing it down enough to cut down on drag.
Senior Member
Joined: 03-31-2008
Posts: 772
From: CLEVELAND
You won't see any significant difference. 5432 miles so far and it has mever been more than 3% off.
