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Sedans Honda Accord Honda Accord Real World MPG
2722 messages, Last post on Mar 16, 2010 at 4:20 PM
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Replying to: dpmeersman (Aug 15, 2008 7:34 am)  I didn't even realize I'd done it. |
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Today, I finally got to do the fillup that allows me to calibrate my Scangauge. Here's the info: 2008 Accord LX Sedan I4 (177hp), AT with just over 3,000 total miles. I filled up at the same pump as before and filled until I couldn't put any more gas in without spilling over. There were 463 miles on this tank when I pulled into the station, and the SG read 31.7 mpg on this tank. I put 15.8 gallons in which yields 29.3 mpg by the calculator. When I did the fillup screen on the SG, it believed that the fuel used was 14.7 gallons. I tweaked the fuel used figure up to 15.8 and this indicated a 7.4% correction factor. If you apply the 7.4% correction factor to the indicated 31.7 mpg on this tank, it corrects to 29.35 mpg....wow....that's within 0.05 mpg. I believe I've got it dialed in. BTW....this tank was about 80/20 Hwy/City and I paid $3.51 per gallon for the gas. Overall, I'm pretty pleased with the gas mileage so far. It's going to be interesting to see how it does when it has 10K miles on it. Ken
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Replying to: guitar4him (Aug 15, 2008 11:26 am)  From the EPA: You need extra room in your gas tank to allow the gasoline to expand. If you top off your tank, the extra gas may evaporate into your vehicle’s vapor collection system. That system may become fouled and will not work properly causing your vehicle to run poorly and have high gas emissions. Also, Topping off the gas tank can result in your paying for gasoline that is fed back into the station's tanks because your gas tank is full. The gas nozzle automatically clicks off when your gas tank is full. In areas of ozone nonattainment, gas station pumps are equipped with vapor recovery systems that feed back gas vapors into their tanks to prevent vapors from escaping into the air and contributing to air pollution. Any additional gas you try to pump into your tank may be drawn into the vapor line and fed back into the station’s storage tanks. |
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Replying to: thegraduate (Aug 15, 2008 11:31 am) "Any additional gas you try to pump into your tank may be drawn into the vapor line and fed back into the station’s storage tanks". Remember the guy topping off his tank and saying his Honda's tank was 21 gallons and not 18.5? He probably just paid for about 5 gallons of gas to go back into the station storage tanks! 
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Replying to: thegraduate (Aug 15, 2008 11:31 am) BTW....where I live, we don't have vapor recovery systems on the pumps. Ken
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Replying to: ljgbjg (Aug 15, 2008 11:41 am) Isn't that against the laws of physics or something. 
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Replying to: guitar4him (Aug 15, 2008 11:42 am) Call me crazy, I just don't see the point in poking that extra bit of gas in there at risk for a problem; new cars are more complicated than cars in years past. Even on trips, I fill up when I get to around a quarter of a tank of fuel anyway; I'm never stuck in a jam worried about how much fuel I have. Plus, the 5-15 miles I might would get out of topping off just aren't worth it to me. I just pump to the click. My results for MPG are consistent within 1 MPG for my regular commute (I use the same gas pump near my home). All that being said, its your car and your money. Congrats on the good mileage
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Replying to: tankbeans (Aug 15, 2008 11:45 am) Man, gas costs enough without paying for it to go back into the tanks at the station!! They probably laugh their butts off when they see people doing that, knowing what is happening. Here in NJ you cannot pump your own gas - it is all full service - yet $3.58 a gallon last weekend for regular, GULF. They set the pump, it stops, they round to the nearest $.05 and you pay. That is it - - and if my tank were any more full the gauge would break - I mean it is WAY left of the F mark when they do that. Any more and it would be pointing directly left (My gauge shows full at 12:00 position).
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Replying to: ljgbjg (Aug 15, 2008 11:53 am) 
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Replying to: tankbeans (Aug 15, 2008 1:07 pm) My gauge goes from 12 -6 , full to empty, clockwise. I have had others that went from 2-10 counterclockwise In fact, my present car is an '08 Accord. My '04 S 2000 went from left to right, 3-9, with leds. No consistency even within an manufacturer!
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