Last time I checked it was 1500 a year so must have gone up in the last year or so , if I was doing a lot more driving than I do now it would make sense for me to do this but I only did 1500 miles in the last year and since the 30th of December last year I've still got half a tank left out of my 5th fill up ( should last me till Xmas at this rate lol )
I guess if diesel goes up past £1.50 a litre it makes more sense for me to do it as we're at £1.429 a litre today ( thats close to £6 a gallon already , when I started driving in 1986 petrol was £1.18 a gallon about 26p a litre !! )