OK, I have recalculated my Mileage data again. And the figures feels wicked. I just hope I am correct this time because I am now calculating based on the mileage used and not some other crazy ideas like using the distance on the future tankfull. Anyway, they are not as consistent as I wanted since I have to use my car on full load at least once in that same tank. Or even a drive into town. And that, gives me an average of perhaps, 13.8 Km/L?