Best Mileage?
From : steve b
Q: i have a 06 2500 cummins. overhead theres a mileage indicator. this trip on a downhill run it got up to 43.3 mpg. just how accurate are those overhead indicators steve .
Replies:
From : craig c
hammertime wrote actually mine is accurate to within about .7 mpg. ive never read anything about why the computer is inaccurate but i would imagine that it is because it takes an average of an average a mathematical no-no. so the inaccuracy could go either direction depending what the driving style is since last reset. craig c. .
From : snoman
on wed 16 may 2007 172026 -0400 roy roy@fhome.net wrote they are deadly accurate. deadly is not a term i would use. they are as accurate the calibration of the fuel metering system of vehicle and like anything there is production tolerance and some with be mostly on and some will be off some. also since it is relative to speedo accuracy as well until they all use gps for speed and distance verification and it is indeed deadly accurate it will never be right one unless your car is a fluke. change your tire size and accuracy can go right out the window ----------------- thesnoman.com .
From : roy
on wed 16 may 2007 172026 -0400 roy roy@fhome.net wrote they are deadly accurate. deadly is not a term i would use. they are as accurate the calibration of the fuel metering system of vehicle and like anything there is production tolerance and some with be mostly on and some will be off some. also since it is relative to speedo accuracy as well until they all use gps for speed and distance verification and it is indeed deadly accurate it will never be right one unless your car is a fluke. change your tire size and accuracy can go right out the window ----------------- thesnoman.com idiot that was a goof! everybody who owns a dodge knows they are not at all accurate. but wait a sec you dont own a dodge. .
From : roy
i have a 06 2500 cummins. overhead theres a mileage indicator. this trip on a downhill run it got up to 43.3 mpg. just how accurate are those overhead indicators steve they are deadly accurate. .
From : roy
i have a 06 2500 cummins. overhead theres a mileage indicator. this trip on a downhill run it got up to 43.3 mpg. just how accurate are those overhead indicators steve actually they suck! inaccurate as hell. you should get around 17-21 mpg mt on the highway. yours isnt broken in yet after about 15k you should be at about peak. you can hasten it by working the hell out of it. go find sombody with a trailer and a back hoe and run it up and down hills for a weekend. .
From : tom lawrence
i have a 06 2500 cummins. overhead theres a mileage indicator. this trip on a downhill run it got up to 43.3 mpg. just how accurate are those overhead indicators that was either an instantaneous reading some years have both average economy and instant economy displays or you had just reset it. but - at that point in time with you running downhill you probably were getting 43mpg. if everything is left stock tires wheels fuel system id say the overhead is accurate to within 5% or so as long as youve got over 100 miles since its last reset again different model years use different algorithms to average fuel economy. .
From : ed h
my 99 ram gas burner shows about 10% higher than actual mpg. that also means that the distance to empty dte is off by about the same. i regularly check the odometer by comparing it to highway mileage marks which is within 1%. i have a 06 2500 cummins. overhead theres a mileage indicator. this trip on a downhill run it got up to 43.3 mpg. just how accurate are those overhead indicators steve .
From : hammertime
on may 16 229 pm roy r...@fhome.net wrote trip on a downhill run it got up to 43.3 mpg. just how accurate are those overhead indicators steve actually they suck! inaccurate as hell. you should get around 17-21 mpg mt on the highway. yours isnt broken in yet after about 15k you should be at about peak. you can hasten it by working the hell out of it. go find sombody with a trailer and a back hoe and run it up and down hills for a weekend. actually mine is accurate to within about .7 mpg. i only have 1600 miles on my truck but ive been hand calculating mpg and monitoring the overhead and so far my overhead mpg indicator is only .7 mpg overly optomistic. that seems ok to me. fwiw my 2006 2500 cummins 4x4 reg cab slt is averaging 16.3 hand calculated 17.0 on the overhead for mixed city/highway driving. about 65% city/heavy traffic 35% open hiway. i only cruise at 70 mph when on the open hiway. this is my 5th dodge truck first cummins. so far absolutely no issues whatsoever and i love it! cliff .