Onboard computer mpg - how is it calculated?

Asked by Apr 19, 2014 at 09:04 PM about the 2012 Ford Focus

Question type: Maintenance & Repair

When I zero the onboard memory for mpg the readout is quite responsive to driving
conditions for many miles.  Eventually, though, it doesn't vary nearly as much as driving
conditions change.  Just interested, what is the formula or algorithm the computer uses to
calculate the mpg?

1 Answer

10,575

It is average based. The computer compairs the amount of fuel it injects to the run time since the last reset.

Your Answer

Ford Focus Experts

  • #1
    Tom Demyan
    Reputation
    1,390
  • #2
    dandyoun
    Reputation
    1,180
  • #3
    Su'ad Barakat
    Reputation
    940
View All

Related Models For Sale

Used Ford Fusion
1,115 Great Deals out of 76,679 listings starting at $1,299
Used Honda Civic
833 Great Deals out of 78,398 listings starting at $900
Used Ford Fiesta
145 Great Deals out of 18,289 listings starting at $1,995
Used Chevrolet Cruze
1,010 Great Deals out of 64,098 listings starting at $3,499
Used Toyota Corolla
928 Great Deals out of 66,116 listings starting at $1,995
Used Ford Mustang
760 Great Deals out of 42,755 listings starting at $1,300
Used Mazda MAZDA3
361 Great Deals out of 27,135 listings starting at $1,059
Used Honda Accord
1,023 Great Deals out of 62,741 listings starting at $999
Used Hyundai Elantra
541 Great Deals out of 41,962 listings starting at $795
Used Toyota Camry
1,081 Great Deals out of 72,629 listings starting at $990
Used Ford Escape
1,123 Great Deals out of 85,051 listings starting at $999
Used Chevrolet Malibu
1,236 Great Deals out of 78,091 listings starting at $1,500
Used Nissan Altima
1,154 Great Deals out of 74,938 listings starting at $999
Used Volkswagen Jetta
585 Great Deals out of 42,036 listings starting at $700

Used Cars For Sale

2017 Ford Focus For Sale
3 Great Deals out of 23,270 listings starting at $9,647
2016 Ford Focus For Sale
196 Great Deals out of 7,392 listings starting at $7,999
2015 Ford Focus For Sale
81 Great Deals out of 4,006 listings starting at $6,799
2014 Ford Focus For Sale
227 Great Deals out of 7,090 listings starting at $5,195
2013 Ford Focus For Sale
73 Great Deals out of 2,902 listings starting at $4,595

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.