saganian1
Member
How trustworthy is the onboard MPG display?
Do you trust the onboard MPG numbers without questioning?
Based on my experience, my manual calculations always come up short compared to the onboard MPG values. So i decided i could trust it no more.
I do quite a lot of long distance travel. This is what i always do to get my manual calculations.
1. I fill the tank till the pump/nozzle clicks;
2. I reset the trip meter to 0 and reset onboard MPG meter as well;
3. I would travel 250+ miles and another 250+ miles back home;
4. I go to the same diesel pump at the same gas station for fill up;
5. I fill the tank till the nozzle clicks;
6. MPG calculated = Y/X (Y from the trip meter; X from diesel pump display)
I repeat the same steps every time i take these trips.
my calculated MPG is always less than the onboard MPG display.
About 5mpg less on average. So if the computer displays 55mpg, my calculation would be something like 49, 50, or 51mpg.
So i decided i could not trust the computer. Previously i owned a 2011 MINI hardtop turbo which had a onboard MPG meter too, same thing, my manual calculations would always fall short when compared to its onboard displayed values. And before that car, i owned a 2010 MINI hardtop non-turbo, also the same case.
So, is it me who may have miscalculated?
or, is it the auto makers who may have tweaked the computer to display a higher value when it comes to MPG?
Either way, however, i enjoy the 50+ mpg fuel economy, definitely more so when compared to mid 30s mpg by the MINI turbo (which demanded premium gasoline).
I own a 2015 Golf TDI with manual tran. I traded my MINI for it spring 2015. I should've done it sooner. I was tired of paying for premium, the stiff ride even after i replaced those run flat tires with comfortable regular Yokohomas and the lack of interior space. However the MINI was a fun zippy car to drive, but i don't miss it.
So what is your experience like? specifically with the onboard MPG gauge.
Please share it with me, thanks.
Do you trust the onboard MPG numbers without questioning?
Based on my experience, my manual calculations always come up short compared to the onboard MPG values. So i decided i could trust it no more.
I do quite a lot of long distance travel. This is what i always do to get my manual calculations.
1. I fill the tank till the pump/nozzle clicks;
2. I reset the trip meter to 0 and reset onboard MPG meter as well;
3. I would travel 250+ miles and another 250+ miles back home;
4. I go to the same diesel pump at the same gas station for fill up;
5. I fill the tank till the nozzle clicks;
6. MPG calculated = Y/X (Y from the trip meter; X from diesel pump display)
I repeat the same steps every time i take these trips.
my calculated MPG is always less than the onboard MPG display.
About 5mpg less on average. So if the computer displays 55mpg, my calculation would be something like 49, 50, or 51mpg.
So i decided i could not trust the computer. Previously i owned a 2011 MINI hardtop turbo which had a onboard MPG meter too, same thing, my manual calculations would always fall short when compared to its onboard displayed values. And before that car, i owned a 2010 MINI hardtop non-turbo, also the same case.
So, is it me who may have miscalculated?
or, is it the auto makers who may have tweaked the computer to display a higher value when it comes to MPG?
Either way, however, i enjoy the 50+ mpg fuel economy, definitely more so when compared to mid 30s mpg by the MINI turbo (which demanded premium gasoline).
I own a 2015 Golf TDI with manual tran. I traded my MINI for it spring 2015. I should've done it sooner. I was tired of paying for premium, the stiff ride even after i replaced those run flat tires with comfortable regular Yokohomas and the lack of interior space. However the MINI was a fun zippy car to drive, but i don't miss it.
So what is your experience like? specifically with the onboard MPG gauge.
Please share it with me, thanks.