Inaccurate MPG calculations - Discovery dashboard info
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I notice that the MPG average estimate is way off what I am actually getting when fill up at the pump.
For example, recently I went 484 highway miles on 22 gallons based on my fill-up. I know, I was cutting it ridiculously close, given a fuel tank capacity of about 22.5 US gallons. This worked out to actual consumption of 22 MPG. However, the Dashboard was telling me I had average fuel consumption of 26 MPG, which was not the case. This has been my experience for the last few months, with an average LR overestimate of fuel frugality of 3-4 MPG versus reality.
Is anyone else noticing the onboard computer doesn't estimate the average very well?
For example, recently I went 484 highway miles on 22 gallons based on my fill-up. I know, I was cutting it ridiculously close, given a fuel tank capacity of about 22.5 US gallons. This worked out to actual consumption of 22 MPG. However, the Dashboard was telling me I had average fuel consumption of 26 MPG, which was not the case. This has been my experience for the last few months, with an average LR overestimate of fuel frugality of 3-4 MPG versus reality.
Is anyone else noticing the onboard computer doesn't estimate the average very well?
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As it relates to fuel economy, also remember that if you are using E-10 (10% Ethanol) that you will lose up to 3% of the stated fuel economy on the Monroney sticker that was on the original vehicle. If you are using gasoline above E10 your economy will continue to drop. As it relaters to the TDI vehicles, the higher the content of Bio-diesel will the lower the fuel economy as well.
Last edited by astctp@ncscbg.biz; 10-08-2019 at 08:21 AM.
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