[QUOTE="Rich"] The point was that in 1973, the prospect of a £5 gallon was a reality (or so we thought) within a couple of months. In fact, it took 34 years for it to reach that level. I won't argue with your maths, but it seems wrong.[/QUOTE] It is, a bit, due to my being unable to read column headings. RPI index for 11/1973 was 97.4 (01/1974 = 100) RPI index for 10/2007 was 824.1 ([URL]http://www.statistics.gov.uk/statbase/tsdtables1.asp?vlnk=mm23[/URL]) So that means £1 in November 1973 would equate to £8.46 now. Or your 1973 fiver would be £42 quid now. Meaning the 12 gallons it takes to fill my tank would cost £507 in 2007 money. Even with the corrected maths, that's a fuck of a lot of money. I think Grimly may be on the money saying that £100/tank would be a more likely trigger point. But it wouldn't change driving habits as such, it'd mean I'd be driving a 60mpg car, not a 30mpg one, and car manufacturers would have found a way to get similar performance from half the fuel. Most likely by making them lighter - even the smallest urban motorised fag-packet weighs a ton and a half these days.