Running '08 2.4 on 87 octane
#23
Since about my second or third fill up I've been using Shell 93 rating gas.I do remember the mileage picking up when I switched to premium but that could have also been the engine breaking in.
I average about 27 m.p.g. in the summer,23-24 in the winter.The highway mileage is my only real disappointment.I've never gotten over 31 on a long highway trip.I've put that down to the HHR being a bit of a brick and the fairly low final drive ratio with the 5 speed manual trans.
I average about 27 m.p.g. in the summer,23-24 in the winter.The highway mileage is my only real disappointment.I've never gotten over 31 on a long highway trip.I've put that down to the HHR being a bit of a brick and the fairly low final drive ratio with the 5 speed manual trans.
#25
I usually always put in 87 (I'm cheap)...but this past week I decided to put in a tank of 93 because I haven't ran any in a long time. OMG what a difference already. I'm averaging 28 mpg in the city on my 3rd day...generally on day 3 I'm at 22-23. Also the throttle response seems a little tighter (probably my imagination). I think from here on out I'll stick to 93.
#26
vinnyac 06 HHR 2LT Loaded 140,000 miles. Hi everyone, just wanted to say, I use hi-test gas instead of regular because less engine knock, less engine noise, runs better on premium fuel. Engine has no mods. the only add on was a power chip hook to the mass air control, two wire hook up. The chip gets about 1-2 miles more in the city 22=23 and 30=33 on the highway. It also makes the auto trans shift better. As for the cost of gas, regular vs premium, at 20 cents more a gallon for premium, that's $3.20 a tank full. Why be cheap, you get better over all performance. If 3 bucks is to much for you, what can I say?
#30
It's hit or miss here. Some places midgrade and premium are only $.10 increments, I've seen a couple places where premium is as much as $1 over regular. But most places I've seen back home(lived in Michigan for 12 years) was $.20 over for premium.