R50/53 Correction Factor for Fuel Consumption
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5th Gear
Joined: Apr 2013
Posts: 731
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From: Near Portland, OR, USA
Correction Factor for Fuel Consumption
I'm curious if others are using a correction factor for the OBC fuel consumption gauge. If so, what number are you coming up with ?
I have these instructions (for more details, see the stickies at the top)
"20.0 Correction factor for Fuel consumption Formula for correction:
Shown consumption x 1000 / user defined consumption
Push the trip reset button to begin the correction. Numbers count up from 0-9, when correct number shows push trip reset button.
20.1 Sets 10ths. for consumption factor
20.2 Sets 100ths. and 1000ths. For consumption factor
20.3 saves the new consumption factor and shows new value"
I decided to get figures from several gas receipts, and average the final products together.
28.3 x 1000 / 27.33 = 1035.49213
25.8 x 1000 / 24.92 = 1035.313
29.4 x 1000 / 28.59 = 1028.331
29.7 x 1000 / 28.28 = 1049.84093
Those average to be 1037.24441 -I am guessing that there's an instruction missing, and one needs to divide by 1000 or move the decimal or whatever. I'm going to try with the value of 1.037
For those that are curious: First couple tanks above were from when I just got the car last April. Last two were from beginning of June. I tried a few tanks from several different stations, including one that sells zero-ethanol 92 octane gasoline. I found that I like Chevron 92 octane best. The car really seemed to like the zero ethanol fuel, but it was super expensive and to my surprise did not give much of an increase in fuel economy.
The last few times I've gotten gas, I have zero'd the trip odometer, but did not reset the ongoing average miles per gallon. I wanted to see if it would become more accurate after having 1000 or so miles in its log. Well the opposite happened, and it became less accurate. In the first couple hundred miles after reseting the average miles per gallon, if I get to feeling spirited on an interstate on ramp for example, I would see mpg fall, after cruising at a constant speed for a while it would go up. After not resetting it for several tanks in a row, it would just always say 28.3, regardless of how I drove, and the discrepancies at the pump were sometimes greater or lesser than usual. -these we're the tanks in the end of June, so I'm not using those ones to calculate my correction factor.
What's your fuel consumption correction factor?
I have these instructions (for more details, see the stickies at the top)
"20.0 Correction factor for Fuel consumption Formula for correction:
Shown consumption x 1000 / user defined consumption
Push the trip reset button to begin the correction. Numbers count up from 0-9, when correct number shows push trip reset button.
20.1 Sets 10ths. for consumption factor
20.2 Sets 100ths. and 1000ths. For consumption factor
20.3 saves the new consumption factor and shows new value"
I decided to get figures from several gas receipts, and average the final products together.
28.3 x 1000 / 27.33 = 1035.49213
25.8 x 1000 / 24.92 = 1035.313
29.4 x 1000 / 28.59 = 1028.331
29.7 x 1000 / 28.28 = 1049.84093
Those average to be 1037.24441 -I am guessing that there's an instruction missing, and one needs to divide by 1000 or move the decimal or whatever. I'm going to try with the value of 1.037
For those that are curious: First couple tanks above were from when I just got the car last April. Last two were from beginning of June. I tried a few tanks from several different stations, including one that sells zero-ethanol 92 octane gasoline. I found that I like Chevron 92 octane best. The car really seemed to like the zero ethanol fuel, but it was super expensive and to my surprise did not give much of an increase in fuel economy.
The last few times I've gotten gas, I have zero'd the trip odometer, but did not reset the ongoing average miles per gallon. I wanted to see if it would become more accurate after having 1000 or so miles in its log. Well the opposite happened, and it became less accurate. In the first couple hundred miles after reseting the average miles per gallon, if I get to feeling spirited on an interstate on ramp for example, I would see mpg fall, after cruising at a constant speed for a while it would go up. After not resetting it for several tanks in a row, it would just always say 28.3, regardless of how I drove, and the discrepancies at the pump were sometimes greater or lesser than usual. -these we're the tanks in the end of June, so I'm not using those ones to calculate my correction factor.
What's your fuel consumption correction factor?
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Alanberto
R50/R53 :: Hatch Talk (2002-2006)
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Sep 22, 2015 07:30 AM