Some riders may not know, is displayed on your car dashboard fuel consumption and actual fuel consumption is biased. In fact almost all of the dashboard are saved error. This aspect of the problem is the accuracy of the instrument, the percentage of accuracy is not 100, on the other hand is the deviation of each manufacturer testing methods have not lead to fuel consumption!
generally preferred dashboard fuel consumption and actual fuel consumption percentage error of about 5, is about 0.3-0.6 liters, and some error is relatively large dashboard tables have significant fuel consumption and actual fuel consumption may 1- 2 liters error. This is a lot of riders always felt, add oil how suddenly ran out, a kind of feeling somehow.