31.69 mpg with 93 octane
04-24-2009, 02:20 PM
#11
I have an '06 1LT automatic, and get 25 mpg around town and 29 hwy on 87 octaine. No mods on the car. Seems like I read somewhere that higher octaine would not be good for my type of HHR, however if premium gas would be beneficial on the hwy for long trips, I certainly would want to try it. Any suggestions?
04-24-2009, 05:15 PM
#12
Senior Member
Join Date: 03-27-2008
Location: Blue Springs Missouri
Posts: 471
well.......... i have a 2.4 have used 87 oct and just got back from springfield, and decided to drive 65 and under...... got 30.7 per gallon......... i have no modes, straight factory, and 87 oct.,
but this will be once in long while due to thats not my normal drive.....
kc to memphis 87 oct 27.6 at avg 85 with air
these were not dic numbers this was manual caculations with my fancy texas calculator.
but this will be once in long while due to thats not my normal drive.....
kc to memphis 87 oct 27.6 at avg 85 with air
these were not dic numbers this was manual caculations with my fancy texas calculator.
04-25-2009, 09:52 AM
#13
Member
Join Date: 02-17-2008
Location: minneapolis
Posts: 58
My last trip (700miles), all freeway, I easily got 32.5. 4 adults in the car, winter, cruise on the whole way, averaged about 70 mph. 2.2, no mods, regular gas, 0W30 Mobil 1.
Summer trips with only 2 in the car I can easily get 33.5, I've gotten 34.5 with good winds both ways.
Summer trips with only 2 in the car I can easily get 33.5, I've gotten 34.5 with good winds both ways.
04-25-2009, 10:27 AM
#14
Senior Member
Thread Starter
Join Date: 12-20-2008
Location: durham north carolina
Posts: 835
reset
the results i posted are not from getting on the hwy and hitting the reset. they are from an average and or figured on paper after each fillup. i did reset today after fillup. 14 gallons this time , and i'm also trying 89 octane now to see how it results. 40+ miles since fillup and reset , 37mpg , but this on "country/curvy/hilly roads w/only a few stops , at 45-65 mph..... oh , i was getting 7mph at 115mph before the reset. but i didn't set the cruise control 
, also there were no houses to hit , and i was not racing
.....i really think that something is a little "off" on my hhr -besides me
- , after seeing so many get better mpg , unless they travel where the terrain is much different...but i've also seen a few list that they are getting much less...i think i need to find a local tuner...has anyone tried a tune from their local shop , for mpg ???
, also there were no houses to hit , and i was not racing.....i really think that something is a little "off" on my hhr -besides me- , after seeing so many get better mpg , unless they travel where the terrain is much different...but i've also seen a few list that they are getting much less...i think i need to find a local tuner...has anyone tried a tune from their local shop , for mpg ???
04-25-2009, 05:08 PM
#15
i really think that something is a little "off" on my hhr -besides me- , after seeing so many get better mpg , unless they travel where the terrain is much different...but i've also seen a few list that they are getting much less...i think i need to find a local tuner...has anyone tried a tune from their local shop , for mpg ???
- , after seeing so many get better mpg , unless they travel where the terrain is much different...but i've also seen a few list that they are getting much less...i think i need to find a local tuner...has anyone tried a tune from their local shop , for mpg ???
your input has been quite helpful!
04-26-2009, 12:38 AM
#17
Senior Member
Join Date: 01-13-2008
Location: Washington State, where it rains
Posts: 4,708
After looking at al the various MPG's I'm glad I have an SS,,,,, My last trip got me 31.5 with a load and quite a variale terrain and I generally see 28 locally.....only difference being..Ive go wow power! and this is with the stage kit..though I did see about the same before and running 87 gas. I could never complain about a 2.0 that feels like a v8....!!
04-26-2009, 06:55 AM
#18
Member
Join Date: 02-17-2008
Location: minneapolis
Posts: 58
The high mpg's are pretty much fill up, hit the reset, then hit the freeway. I still get easily 25-27 in combo city driving. A bit of freeway, surface streets, etc. Still as good or better than a lot of vehicles out there,and better than anything else with this kind of interior room. Plus it's just a great vehicle to drive and look at.....wish I could afford another for myself.
05-10-2009, 07:00 AM
#19
Senior Member
Join Date: 03-14-2009
Location: Youngsville, North Carolina
Posts: 262
Just wanted to say that I pumped in 14.6 gallons of 93 octane yesterday and although I have nothing to prove it, I can feel a difference in the performance. Before, I had a strange issue that could best be described as a "flat spot" in throttle response between about 40 and 60 where I would push on the accelerator slightly to pick up a little speed and the response was sluggish so I'd push a little more and the engine would "surge" or respond disproportionate to the last throttle adjustment.
Now I don't notice that with the 93 octane.
I wonder if the computers that control the valve timing and such react differently with the higher octane fuel? Whatever it is, I'm sticking with the premium gas.
Now I don't notice that with the 93 octane.
I wonder if the computers that control the valve timing and such react differently with the higher octane fuel? Whatever it is, I'm sticking with the premium gas.
05-10-2009, 08:59 AM
#20
Member
Join Date: 03-14-2009
Location: Jonesville, Michigan
Posts: 38
i normally use between 91 and 93 octane, which ever the highest they have, and recently went on a 5 hour road trip, 2.5 hours there and back, and was gettin between 32 and 33 mpg. i have a stock 2lt with a 2.4 liter and no mods.