Avg MPG Calculator Error: Sign of Other Issues?
All of my searches have returned MPG discussions related to tire size, weight, etc, so I'll apologize if this has been discussed, but I can't find it (either via JF search or google search).
I got home from a trip to the coffee shop this morning and the Avg Eco reading was 18 mpg (not unusual, since I filled up, reset and almost all subsequent driving was highway). I got back in it a couple hrs later with the same reading and went to the store a couple miles away. When I got back in for the trip home, the Avg Eco mpg read 9.0.
I'm not naive enough to believe that these calculators are 100% accurate (in fact, the reading on my JK is usually 1-1.5 mpg lower than actual based on pump and odometer readings at fill up), but this isn't a calculator error. In this case, the system is simply not working correctly and appears to give random numbers when it wants to. Has anyone else experienced similar results? Is there a chance that this is an indication of other possible problems?