Effect of coasting in Neutral on MPG display
I've read comments from people who coast about this affecting the MPG display.
So here's some more pertinent information. Today I drove up a somewhat twisty road towards a ski area. The road had a 35mph speed limit, and was generally uphill. On the way back down, I started coasting in Neutral (manual transmission) with the engine still on, and reset the A Display while moving. I did this before while driving down a hill at about 60mph, and the display promptly went to ---- for a few seconds, and then read 61.0 MPG
This time, it went to ----, which didn't really surprise me, but I was surprised when it stayed like that for about a mile. By then, I had encountered a slight uphill stretch, and my speed had slowed to about 28mph, so I engaged 5th gear, accelerated gently back to just over 35, and then put the gear lever back in neutral, thinking this would then produce a reading. But no, no reading for the next half mile, until I stopped at a Stop sign, and then pulled away.
So maybe some more experiments along these lines will tell us how the consumption is calculated, possibly being useful to the frequent coasters.
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View my fuel log 2014 Mirage ES 1.2 manual: 46.0 mpg (US) ... 19.5 km/L ... 5.1 L/100 km ... 55.2 mpg (Imp)