Saw someone on Lemmy just now griping that fuel in the States is around $5 per gallon where they are. Currently the petrol prices near me are around £1.60 per litre, and I'm too young to conceptualise a gallon, so I've never really considered the difference in value between the two.
At the current exchange rate, $5/gallon works out to...
99p/litre
or £8/gallon
I haven't paid as little as that in 10 years. And $5/g is on the high side over there! The average is around $4/gallon, which is around 88p/litre.
In fairness though, I presume the US prices don't include tax. No listed price in the US has ever included tax because they're too scared of the freedom of knowing how much something will cost when you go to pay for it.