Here is the recommended Check In prompt definition for capturing fuel:
Note, the text in the "List of keys" is as follows (in case you would like to copy/paste):
1-Under 1/4 tank, 2-Under half, 3-Under 3/4, 4-Over 3/4
It is important that each comma separated key starts with an integer being 1 through 4 inclusive. The system back end needs data in a 1 to 4 range, as the server takes the leftmost single character of the incoming data for this fuel field.