I've owned my current car for 4 years and 4 months. In that time I've made a note of how much I've spent on petrol every time I've filled up. I thought I would share this data with you. If you're wondering what the huge spike is in October 2006, well that's BP Ultimate 102 which cost me £2.42 per litre!
The average cost per litre over the 1,583 days is 97.1p.