Not 100% sure how to interpret your question; do you mean you:
Originally Posted by mitsumi
a) topped off tank and only put 2-3 gallons to fill it up?
b) or you added 2-3gal at expensive gas station just to get home?
if A) than you can enter data mi/km and litter/gal and reset trip meter.
If B) write down how much gas you put, do not reset trip meter and add liters/gallons you wrote down to total. So you may end up with something like 536mi, 11.7gal entry good luck
View my fuel log 2015 Mirage DE 1.2 manual: 46.4 mpg (US) ... 19.7 km/L ... 5.1 L/100 km ... 55.7 mpg (Imp)