still half as cheap as in EU
I think cost per kilometre/lightyear/rod is close
Diesel at the local garage I passed at lunchtime is £1.89 (57% more). The web [0] suggests that is more expensive than anywhere in europe other than France and Denmark for some reason.
So nowhere near "half as cheap". Throw in poor American average mileage and I suspect the price-per-mile is quite similar.