3/18/2024 0 Comments Cara upgrade accurate 4On average, the BMW’s trip computer reported mileage 1.4 mpg higher-nearly 6 percent better-than calculated. Over the course of 20,340 miles and 56 fill-ups, the mpg inflation ranged from 0.8 to 2.6 mpg. But, in years of doing this, I’ve found the BMW’s trip computer has always read higher than the mpg calculations based on the fuel used and the corrected odometer readings. Given the vagaries of filling a gas tank to exactly the same level at each fill-up, some variability is understandable. Every time I fill up my 2007 BMW 335i, I record the gallons used, the odometer reading, and the trip computer’s mpg report. But is it possible that the EPA isn’t the only one prevaricating about fuel economy? This is a subject near and dear to your author. In our April 2013 issue, we took the EPA to task for its unrealistic fuel-economy assessments of hybrids.
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