I created a new spreadsheet when I bought my new car at the end of November last year.
The column headings are as follows:
Date | Station | Grade | Litres | PPL | Total | Distance | MPG | km/l | g/km | l/100km | est. range
I manually enter the date, station, grade, litres, total and distance, the PPL MPG km/l g/km, l/100km and estimated range are calculated for me. I suppose it could do more, I did consider writing a formula for pence per mile but it confused me (the fuel economy and price for fuel are actually on separate receipts/events if you think about it).