Join Date: Mar 2006
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The reason it dropped so alarmingly is because you weren't moving and probably shortly after zeroing the maths. If you fill up and run your engine in that way, you have done zero miles but used some fuel which will be measured against that zero distance. I hope that's a bit clearer than mud. Conversely, if you roll it down a long hill without using fuel, the miles have increased but the fuel has not decrease, ergo high reported mpg.
Best way to check your mileage is by brimming it before a decent-length journey and once happy with, forget it until something flutters.
Confucius he say "Wise Inuit never eats yellow snow"
Currently in vass20's garage:
Citroen Relay 2.2 HDi + Citroen C4 1.6 HDi EGS