Long road trip and hoping to get 500 miles per tank
03-15-2012, 08:50 AM
#11
Senior Member
Join Date: 09-11-2007
Location: Palm Bay, Florida
Posts: 1,378
When using cruise control over hilly terrain, the transmission will more likely downshift to keep up speed. Without cruise, you can let the car slow down until you crest the hill and coast back up to speed. The downside is that if you are in traffic, the change in speed on two lane roads can irritate those behind you. If you read hypermilling techniques, those who religeously practice, kick the car in neutral going down hill. At 55 mph my HHR runs at 2000 rpm, in neutral coasting downhill, the car is running 800 rpm. This practice, my opinion, should not be done in any traffic.
Cruise control is just that, it will hold to what ever speed you set it ay +/- 2 mph.
Cruise control is just that, it will hold to what ever speed you set it ay +/- 2 mph.
03-15-2012, 10:32 AM
#12
Senior Member
Join Date: 10-21-2008
Location: hemet, calif.
Posts: 1,831
I never have checked my mileage my 2006 2lt filled up yesterday $60.00 would not take anymore the DIC indicated enough fuel for 264 miles, I may have to start checking mileage, Im retired did not get the HHR for gas mileage.
03-15-2012, 11:39 AM
#13
Senior Member
Join Date: 12-20-2011
Location: Ohio
Posts: 102
You can probably do it...if you do as Old Lar has suggested. But remember, weather is a big factor right now. You'll need to get 34-35 miles MPG, which is attainable with the proper skills. I've done it.
Oh, and forgot to say....on the synthetic oil question. Yeah, you probably get better mileage by using syntheic. BUT it is not measureable....maybe something like .1 or .2 MPG.
I use it for other considerations.
Oh, and forgot to say....on the synthetic oil question. Yeah, you probably get better mileage by using syntheic. BUT it is not measureable....maybe something like .1 or .2 MPG.
I use it for other considerations.
03-15-2012, 01:13 PM
#14
Senior Member
Join Date: 07-17-2006
Location: Dallas, GA
Posts: 6,050
When using cruise control over hilly terrain, the transmission will more likely downshift to keep up speed. Without cruise, you can let the car slow down until you crest the hill and coast back up to speed. The downside is that if you are in traffic, the change in speed on two lane roads can irritate those behind you. If you read hypermilling techniques, those who religeously practice, kick the car in neutral going down hill. At 55 mph my HHR runs at 2000 rpm, in neutral coasting downhill, the car is running 800 rpm. This practice, my opinion, should not be done in any traffic.
Cruise control is just that, it will hold to what ever speed you set it ay +/- 2 mph.
Cruise control is just that, it will hold to what ever speed you set it ay +/- 2 mph.
Unless I'm climbing up a mountain, it's pretty rare I need to downshift. The 4.17/1 ratio pulls pretty decent.
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