Fuel consumption calculator/logger thingy, anyone got link?

[All that jazz]

I saw a post on here a while back with a link to a German(?) site where you could input your vehicle details and you got some tables to enter your mileage when you fill up, cost, how many litres etc and over a period of time it calculates your mpg and other stuff. Tried a few different search engine combos but can't find it. Anyone know what I'm on about and do you have a linky please (or linky to any good alternatives if not)?

Ta.

[snorkel sucker]

This is quite useful

[thebigmacmoomin]

http://www.spritmonitor.de/en/

[pilchardthecat]

Do you want to develop an obsessive compulsive disorder.......?

[jon-]

I think you want http://www.fuelly.com/

You even get a badge.

[pilchardthecat]

[All that jazz]

Thanks guys! No OCD here, but I want a rough idea of what the mpg is on my newly acquired Puma just to see how it compares to other folks' ones. Of course I could do it the manual way but I simply can't be arsed. Somehow, worrying about mpg doesn't seem important anymore when you don't have an OBD. In my previous Astra's I was always checking the average mpg figure every few days to make sure it was still the same. Shirley I'm not the only one that does that with cars fitted with them? Really need to get a life..

It was the spritmonitor one I'd seen but that Fuelly one looks interesting too. Well, as "interesting" as fuel consumption calculators can get anyhow.