The MPG display had us preparing to write a story saying this vehicle is as efficient as a hybrid. In a test of an all-new 2021 model year crossover, we zeroed the average and the trip odometer and set out on our test. As MGP displays go, this is one of the more accurate ones we have seen. It likes to tell me the vehicle has a 30 MPG average over a tank, but when I compare that using miles traveled to gallons consumed, it is almost always about 29 MPG.
In a 2016 Subaru Forester 2.5i Premium that I own, the display is almost always about 1 MPG, or about 3% high compared to what the vehicle actually achieves for MPG. Most of the time, the MPG display you see in your dash display is telling you your mileage is about 10 to 15% better than it actually is. Over hundreds of vehicles tested, we have only seen the display be accurate a handful of times. We’ve compared the average MPG displays in our test vehicles to the actual miles traveled per gallons consumed for years. In almost all cases, we have found through testing that they are wildly optimistic. Who doesn’t want to know how many miles per gallon they are getting? The problem is, these in-vehicle average MPG displays are almost always inaccurate. Fuel economy displays in our vehicles offer a neat bit of information.
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