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    #16
    I don't keep track of it or anything, but it's not like the little math equation is that difficult to do on your way back from paying the ugly lady behind the counter.

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      #17
      Originally posted by Bill 84 318i
      I don't keep track of it or anything, but it's not like the little math equation is that difficult to do on your way back from paying the ugly lady behind the counter.
      exactly, i don't have a little book i keep track of them or a calculator i keep in my car, i just do the equation in the car or whenever have some spare time to think about it. I just like to know how wasteful my car is being.

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        #18
        yeah its not to hard to do real quick in your head a 14g fill and 300 miles on the tank, = 21mpg, not to hard. Just push the trip odometer every time you fill up and wham there is the mileage
        E30 325ix 62k

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          #19
          btw how big is the e30 gas tank, i don't think i've ever put more than 11 gal in it.

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            #20
            depends on your car. some e30s have smaller tanks than others. I think mine is 16.5 gallons.
            Build thread

            Bimmerlabs

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              #21
              I put 12 gallons in once when the reserve light was on.
              Originally posted by Gruelius
              and i do not know what bugg brakes are.

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                #22
                yeah you probably have the smaller tank. I think it's around 14 gallons. I usually put 15 in when I fill up. :)
                Build thread

                Bimmerlabs

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                  #23
                  I looked at my obc when i first got the car and it said 11, and i was goin crazy, then i realized it was in liters, and also in kilometers. Is that how all obc's are, because its really annoying. this is my first e30 with an obc, so i dont know much about it. also i need to change the light in it, is there a write up on that by anychance. I plan on changin it when i put my new headunit in. thanks
                  90 325is
                  IE stage 3s and refeshed m20....

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                    #24
                    To change the light this should help, it's real easy but the backlight costs like $30 or something crazy. http://www.r3vlimited.com/Tech/OBC.htm

                    To change the readings from Metric to Standard, push the MPG button and then push the small pin hole on the bottom right of the OBC. hope that helps.

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                      #25
                      mostly i've got 28 MPG with my 318
                      and can fill my tank approx wiith 12 gal

                      my 2.7 has a big 18 MPG but it's not a daily driver so why matter

                      but you US guys have cheap gas
                      I can pay $4 a gallon for 98oct and $3.90 for 95oct

                      1989 E30 318iS_______________________________1989 E30 325iC M-Technic I
                      1997 E36 328iT
                      1990 E30 325iT 24v SOLD
                      1989 E30 325i 2.7i M-Technic II SOLD

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                        #26
                        Originally posted by LikeCDoos
                        To change the light this should help, it's real easy but the backlight costs like $30 or something crazy. http://www.r3vlimited.com/Tech/OBC.htm

                        To change the readings from Metric to Standard, push the MPG button and then push the small pin hole on the bottom right of the OBC. hope that helps.
                        damn $30 for the light, does anybody have a partnumber for the light that im looking for?
                        90 325is
                        IE stage 3s and refeshed m20....

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                          #27
                          Originally posted by Gruelius
                          and i do not know what bugg brakes are.

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                            #28
                            Originally posted by 318driver
                            Originally posted by LikeCDoos
                            To change the light this should help, it's real easy but the backlight costs like $30 or something crazy. http://www.r3vlimited.com/Tech/OBC.htm

                            To change the readings from Metric to Standard, push the MPG button and then push the small pin hole on the bottom right of the OBC. hope that helps.
                            damn $30 for the light, does anybody have a partnumber for the light that im looking for?
                            -OBC backlight (BMW part number 65-81-1-375-461)
                            -keypad bulb (BMW part number 62-11-1-368-299)

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                              #29
                              I get probably 28 in my eta. My OBC is a little messed up. It tells me im getting 25.5, which it probably does sometimes. My fuel gage also likes to jump around a lot. If I take a turn a certain way or park on an incline i will either gain or lose a 1/8 tank. Any ideas on that one? It usually is close enough for me to know and i tend to fill up around 300 miles.
                              Old and improved:

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                                #30
                                On 3 hour trips my mpg starts at 28-32 but after I hit a couple of lights and accelerate back to cruising speed it stays at 26-27 the rest of the trip. Any ideas?

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