misterez

Since our HHRs all have tachometers, what would be the most economical RPMs to achieve the best econonmy? I have the 2.4 automatic and have been experimenting with not exceeding 2500 rpm in any gear. I have been able to maintain about 27mpg in mostly city driving conditions doing this. Any other ideas as to the ideal RPMs to try?

battoo

i just try to not hot dog it so far i am averaging 28 mpg with mixed city and hiway

Snoopy

Through extensive research, it has been determined for you to achieve the best gas mileage .....do not exceed -0- on the tachometer.

Just kidding of course....

Can't help you with the maximum RPM's. But, I would suggest to be careful in your attempts to be frugal. Staying at very low RPM's, while shifting thru the gears, could cause burned valves...under some conditions.

I believe just normal type of operation and good maintenance provide the best longevity for a vehicle.

GDZHHR

I just try not to accelerate to quickly and keep it between 2000-2500 rpm.

courthousedeb

Since I got the CGS, I'm more leadfooted than I was before...and I'm still at 26.4 in the city. These cars get great gas mileage...at least mine does.

BlackHHR

I run my 2.2L 5 speed in town at 3000rpm and get around 27mpg.
on highway its at the same rpm and i get 33mpg.

I also have a Scangauge 2 hooked up and it reads how well i'm getting too.
it is very close to what i really get. about 2 mpg out....i did the math.lol