DIC Vs Hand Calc MPG
April 15th, 2014, 10:14 AM
#31
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Sensi 73shark made a statement early on about eventually running out of gas if only going by the DIC amount used... the last tank I let run down below the quarter mark... I put in the 18.6 used and the needle just barely clipped the "full" hash mark... I just filled up again with 10.6 used and this time the needle did not reach the full hash mark and was a good needle width off....
I'll let it run down to the half and make note of "used" and what I can get in to the first shut off...
I'll let it run down to the half and make note of "used" and what I can get in to the first shut off...
April 15th, 2014, 12:47 PM
#32
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I hate to be a broken record but I simply don't believe the DIC will ever be as accurate as hand calculations. I've just experienced it on too many vehicles to think otherwise.
April 15th, 2014, 12:53 PM
#33
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Sensi 73shark made a statement early on about eventually running out of gas if only going by the DIC amount used... the last tank I let run down below the quarter mark... I put in the 18.6 used and the needle just barely clipped the "full" hash mark... I just filled up again with 10.6 used and this time the needle did not reach the full hash mark and was a good needle width off....
I'll let it run down to the half and make note of "used" and what I can get in to the first shut off...
I'll let it run down to the half and make note of "used" and what I can get in to the first shut off...
Or you'll get to the point of putting in a very limited amount.
April 16th, 2014, 8:59 AM
#34
gauges
Yea, I don't trust my Tachometer, speedometer, or odometer either... and the damn microwave's been giving me dirty looks as well...
that's why I personally walk each mile I drive, using both a GPS and hand held measuring wheel. then I drive back each way 3 times, while using a trained squirrel to watch the engine spin around and count the spins while my trained penguin keeps time, carrying the world's smallest atomic clock on his back
seriously, it's all going to be irrelevant in 20 years
For me, sooner.
the plan is summer 2015 to give the Tahoe to the Wife, and pickup a Model S!
No more MPG for me!
April 16th, 2014, 11:02 AM
#35
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Hey Sabr, I'm willing to break in that Model S for you, just say the word! I'm with you, can't wait to have one, but for me I don't think it's in the cards in the near future.
May 2nd, 2014, 3:24 PM
#36
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Well I just filled up the other day, let it run down to the fuel light...
DIC says I used 18 gallons, when I filled up to first click I got in 22.1 gallons... that is 4 gallons different
Now the real head scratcher is the MPG, DIC says 18.3 mpg but hand calculated says 14.95 I have never gotten that low of mpg even with hand calculated.. that tank lasted me almost 3 weeks and per the trip odo 329 miles..
something is amiss...
DIC says I used 18 gallons, when I filled up to first click I got in 22.1 gallons... that is 4 gallons different
Now the real head scratcher is the MPG, DIC says 18.3 mpg but hand calculated says 14.95
I have never gotten that low of mpg even with hand calculated.. that tank lasted me almost 3 weeks and per the trip odo 329 miles..something is amiss...
May 2nd, 2014, 9:43 PM
#37
Administrator
You just made up the difference in all of those fillups where you just put in what the DIC said you used and the truck actually used more than that. Think that's what I said would happen awhile back. 
May 3rd, 2014, 10:08 PM
#38
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May 8th, 2014, 6:39 PM
#40
Administrator
Ran the numbers on the last 15 fill-ups which were all done at the same pump. The average error was 4% w/ the DIC being high. While I didn't normalize for the amount of the fill, they were all for about 3/4 tank and the spread was about 2% to 5%.