Incorrect mpg

[Winky]

Sorry Ciderbarrel, but I have to agree with RussTaylor on this one. In his example he wrote "...and perform a **FULL** fill up..." (emphasis added). In your rewriting of his example, this time with the giant coke bottle, you wrote "...and put 30L back in, it is still **NOT** full." (emphasis added) It looks like you weren't trying to deceive but just didn't read RussTaylor's example correctly.

In the examples above you don't have to know what the individual numbers are for x, y, and z, you just have to know that x + y + z = 60L.

I would say don't worry about adding partial fill-ups just aggregate the amounts on your own. Sure, you might go 800mi and add 80L to a 60L tank (or some other made up numbers) but you would get an accurate mileage for that time frame. This would really mess up trending though so I almost never do it even before I started using this site.