How accurate is your DIC?
Thread Starter
TECH Enthusiast
iTrader: (2)
Joined: Dec 2007
Posts: 677
Likes: 0
From: Sherwood Park, AB
How accurate is your DIC? So I got back from a trip to Lethbridge today, and figured I'd check the fuel economy calculation from the DIC to what the trip odometer and fuel pump said.
For this trip, I just set the cruise control at the speed limit (mostly 110 km/h) and let pretty much everyone else on the highway pass me (four lane divided highway all the way). Damn, that was hard to do
Anyway, the DIC said fuel economy was: 8.3 liters/100km, or 28.3 MPG (US gallons). I thought that was pretty good.
Fuel Pump/Odometer calculation: 42.5 liters and 529 km (~11.25 US gallons and ~329 miles) for 8.04 liters/100 km or 29.25 MPG (US gallons) or 35 MPG (imperial gallons). Have to admit to being surprised at the result, never figured the GXP would get that kind of mileage.
So the DIC was within about 2.5% on the mileage calculation, not too bad, I think. Anyone else bother to check out the accuracy of theirs?
For this trip, I just set the cruise control at the speed limit (mostly 110 km/h) and let pretty much everyone else on the highway pass me (four lane divided highway all the way). Damn, that was hard to do
Anyway, the DIC said fuel economy was: 8.3 liters/100km, or 28.3 MPG (US gallons). I thought that was pretty good.
Fuel Pump/Odometer calculation: 42.5 liters and 529 km (~11.25 US gallons and ~329 miles) for 8.04 liters/100 km or 29.25 MPG (US gallons) or 35 MPG (imperial gallons). Have to admit to being surprised at the result, never figured the GXP would get that kind of mileage.
So the DIC was within about 2.5% on the mileage calculation, not too bad, I think. Anyone else bother to check out the accuracy of theirs?
TECH Fanatic
Joined: Jan 2007
Posts: 1,029
Likes: 0
From: LITH, IL.
mine reads a consistant 1.3 MPG low. City, highway, mixed, don't matter, almost always 1.3 low. That would be 5.6% low on the mixed numbers I actually get. BTW, now that the little V8 has started to loosen up (43K miles), the mileage keeps getting better every day! DIC will show 22 MPG with the cruise set at 83 MPH and hovers around 27 at 75 MPH.
TECH Apprentice
Joined: Oct 2006
Posts: 308
Likes: 0
If I run the stock tune or don’t adjust the fuel trims with the DS tune, my Imp DIC also reads about 2.5% under actual. I have not gotten quite your mileage but only have < 20K and have gotten just over 28 real MPG. My DIC seems to be really close when I adjust the trims +3. I used to drive the truck all the time, but with the cost of gas I drive the Imp more often. I hope my MPG goes up like the rest of you with more mileage, then again I guess I could keep it below 70.
Last edited by live2ride; Aug 5, 2008 at 07:26 AM.
