You've lost the CSV import format file
 

Hi,

Various forum posts and the FAQ talk about the example Import Format file at https://www.fuelly.com/csv-format.gas

This file no longer exists. (404 error).

I'm going to try the traditional workaround in situations like this of exporting my current data and seeing if that gives me enough to work with.

The CSV import option is there at the bottom of your car page. The link in the FAQ hasn't been updated.