solman98

Not another one of these threads........ I can get 28, intown, running E10. And it's not flat where I live....

db/sb

http://www.snopes.com/autos/techno/acetone.asp
But those who use it, like the OP, will still argue the merits of using it...his vehicle, his choice.

Snoopy

That is why, in my post, I said, "...at the risk....".

To many areas of credible literature/media that disprove this myth. But the argument and insistence will continue.

urbexHHR

Geez! You guys make me feel bad. On the expressway at 70 I usually get around 28, at 60 I get 32 TOPS!

MODIFIEDmodified

When you look at mileage, what are you trying to accomplish? Higher mileage = cheaper to drive? Do you add-up the per/mile cost of the entire tank of fuel? You acetone guys (and I would NEVER do it) are you including this cost in? If not, you're not looking at the whole picture. If your mileage isn't as good as someone else's, have you checked your RPO codes to see what transaxle ratio you have? These are for my '09.
FQ7 Ratio - Transaxle Final Drive 4.05
FR7 Ratio - Transaxle Final Drive 3.95
FR9 Ratio - Transaxle Final Driver 3.29
FX2 Ratio - Transaxle Final Drive 3.91
FY1 Ratio - Transaxle Final Drive 3.63
My wagon has the FY1 (3.63:1) and I wish it had the FR9 (3.29:1). It wouldn't beat anyone off the light but I'm not trying to chop the tree down coming out of Wal-Mart. The 3.29:1 would give me more speed at any given RPM against any other ratio thus giving better mileage. I have posted my fuel comparison in another thread but I'll copy it to this one also. I drive mostly highway and it's 32 miles one-way to work. I don't get on the interstate so I set the cruise as soon as she shifts into high gear (about 42 mph @ 1500 rpm). I have gotten mileage as good as 36.5 thru an entire tank with 10% 87 so why use 91 at $$$ higher? I wanted to try the E85 to see and feel the difference for myself.
Here, in Tennessee, is what I came up with after several tanks of each:

GASOLINE 87 octane 10% ethanol= $3.45 per gallon (currently)
RANGE (my HHR) = 476 miles
14 gallons = $48.30
MPG = 34
per mile (cost/RANGE) = $0.1015

E85 = $2.99 per gallon
RANGE (my HHR) = 420 miles
14 gallons = $41.86
MPG = 30
per mile (cost/RANGE) = $0.0997

The difference may be minimal per mile but it IS cheaper per mile. Add it up. It comes out to a savings of about $2.00 for every 1,000 miles. It appears to me that it will be cheaper-per-mile as long as you can get the E85 at a price $0.40 per gallon cheaper than gas. I would prefer my money go to a good ole farmer here in the USA

nacademus

my DIC says 29.9 60/40 driving.


I do the math, fricken 25.7.


This car might as well have a parachute. It doesn't deliver on the promise.

egadgetguy

where do I find these codes? I have an '06. And while I wouldn't beat anyone in a real race, I seem to come off the line pretty respectable around town. I also get ~20 city, 24 highway. 2.4L engine is great, gas mileage is not as good as I keep hearing about. It's been that way since I got it in Dec of 06 with 22K on it.

Also, I do the oil every two times it hits zero, but I'm using synthetic...
BTW - I love watching it come down the street. It's so cool!

MODIFIEDmodified

The RPO code build list for your HHR is on a sticker inside your glove box along with the paint code numbers. Search this site for a complete year by year list of the meanings for each. Somewhere in here someone posted a link to an external site that would give you the definition for each RPO code you enter no matter what year or model of GM. I have it on my work computer but not here at home.

diskullman

I got stiffed by a smart light yesterday. Rather than zoom up to the light and stop, I thought I'd roll up slowly, to time the light correctly. The light sensed that there was no one at the intersection, and never turned green for my turn. Doh! I had to sit through an extra light.

c2vette

Just another few data points for what they are worth. In regular driving with my SS manual, I average 27 mpg. On a windy road and significant elevation change road I can achieve a best doorstep to parking lot avg of 31 mpg for my commute. Best I have ever managed on a level road at steady 65 mph is 33 mpg. So there.