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03-20-2018, 08:35 AM | #1 |
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Wildly Optimistic Mileage Readout
My previous (2011)128i's OBC mileage readout was pretty darn accurate. Generally within one mpg of what I verified at the gas pump. My current (2010) 128i reads between eight and ten mpg higher than what I'm actually achieving. The distance remaining to empty seems to be right on the money, for some reason. Is this something to be concerned with? I assume mileage is calculated theoretically based on time the injectors are commanded open.
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03-20-2018, 10:31 AM | #2 |
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KM/g?
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03-20-2018, 01:28 PM | #3 |
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03-20-2018, 02:15 PM | #4 |
Sideways and Smiling
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Hmm, you should measure the distance you cover via your phone. You may have a wonky wheel speed sensor, which could contribute to strange distance readings as well, but that would generally generate a DSC fault...
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03-20-2018, 05:54 PM | #7 |
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Mine seems to be about right.
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03-21-2018, 08:38 AM | #8 |
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As I mentioned, the mileage readout on my first 128i was pretty accurate. I tried a gps speedometer ap on my phone, and found that my speedo reads about 2 mph high at 70. Perfectly normal, as far as I know. I'm not freaked out by this anomaly, I'm just curious. The car is running perfectly. No codes. Same actual mileage as my first car. I tried searching this subject, and couldn't find any threads, other than people complaining about poor fuel mileage. I'm actually pretty stoked to be getting the mpg that I do, considering the EPA estimates. I guess it's one good thing about being a flatlander!
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03-22-2018, 10:26 AM | #9 |
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On my first 135, the average mpg number just kept creeping up and up and up until it hit 99.9 and stayed there.
I never bothered to have it addressed, as I didn't really care, but I thought it was funny. My current 135 works fine and I average about 23 mpg combined.
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03-22-2018, 12:50 PM | #10 | |
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Quote:
So I assume that you tried resetting the average mpg, and it never reset, or did it just keep creeping up when you reset it? |
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03-22-2018, 02:19 PM | #11 | |
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It wasn't something I cared about enough to spend time or money on, because I always keep my display on miles to empty.
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"Hrothgar": 2012 135i: 6MT M-Sport, BSM/Blk; Nav, Premium, Convenience, HK Dinan Stage 2 +PPK /// BMW PE /// VRSF CP /// K&N /// Koni Sports /// RSFB Inserts /// MPS4S 225/255 /// Other Stuff |
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