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How accurate is your OBC?

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    How accurate is your OBC?

    Hey tonight i filled up and my OBC said i got 22.6 MPG, when i divided the miles by the number of gallons it said I got 26.1 MPG. Just curious if everyone's OBC is this off the true value.

    #2
    The OBC will calculate MPG for each tank?
    Originally posted by Gruelius
    and i do not know what bugg brakes are.

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      #3
      Yea, it does mpg.
      Jamie Webster
      '89 325is - sold :(
      '96 Miata - sold
      '01 M5 - sold
      '02 Civic Si

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        #4
        Mine's off, but I'm using M50 injectors so the average mpg feature isn't quite accurate. On my last tank, the OBC read 21.7 MPG but in reality I was getting 18.2 MPG.

        '86 325 2.8i stroker - Arctic Blue
        '11 328i Sports Wagon - LeMans Blue
        Strictly Eta

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          #5
          Originally posted by kencopperwheat
          The OBC will calculate MPG for each tank?
          ya all you have to do is reset it everytime you fill up :)

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            #6
            Well we all know the 'range' is the least accurate, especially around <150miles left....

            -Saul
            Saul
            01 330ci Daily Driver
            89 332is Auto-x Friend
            95 M3 *SOLD*
            87 325is *SOLD*

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              #7
              how's this for accurate?


              gotta love california weather
              ________
              VERMONT DISPENSARY
              Last edited by Gr00v3; 05-12-2011, 10:27 AM.

              m42brigade

              r3v Photo Crew: Founding Member

              Originally posted by Eurospeed
              Guys like him are the reason I love it when people do things to their cars that are different. It just like anytime Karlo posts a thread with pics of his car, I love watching all the elitist pricks on this site shit their pants when they see an E30 that doesn't fit their standards.

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                #8
                lol CA weather is amazing

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                  #9
                  <====== jealous

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                    #10
                    It is 50F here today in NH. Sunny, a little windy....

                    My atire:
                    Adidas soccer sandals, short sleeve shirt, jeans.

                    I was walkin past people wearing winter jackets. hahaha

                    I FOOKIN RUHLE!
                    Below the radar...

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                      #11
                      Originally posted by Gr00v3
                      how's this for accurate?


                      gotta love california weather
                      I'd show you my picture of my OBC reading 155 Deg. Farenheit, but i'm too lazy to find my digi cam.

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                        #12
                        Originally posted by BS87
                        I'd show you my picture of my OBC reading 155 Deg. Farenheit, but i'm too lazy to find my digi cam.
                        sounds like you got a temp sensor thats gone bad

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                          #13
                          Originally posted by LikeCDoos
                          Originally posted by BS87
                          I'd show you my picture of my OBC reading 155 Deg. Farenheit, but i'm too lazy to find my digi cam.
                          sounds like you got a temp sensor thats gone bad
                          I had that happen to me. Ordered a spare ambient temp sensor off Jordan. $10 is worth the pimpitude of temp sensing accuracy!

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                            #14
                            heres a funny one, While I was stationed in Saudi Arabia in 1992 I saw temps of that at Al Kharj. :? and it wasn't fun.
                            https://www.facebook.com/BentOverRacing

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                              #15
                              Originally posted by M-technik-3
                              heres a funny one, While I was stationed in Saudi Arabia in 1992 I saw temps of that at Al Kharj. :? and it wasn't fun.
                              oh man i think i'd kill myself

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