Now you’re going to put cryogenics in cars? Really?
LOL
Have you ever been around real world mechanics? Do you have an engineering background at all?
It’s really silly. Gasoline or diesel (or even alcohol) doesn’t boil off at 1%/day, or even 0.2%/day, and doesn’t need a dewar. For practical purposes, liquid hydrocarbon fuels in automotive fuel systems don’t boil off at all. LH2 as a motor fuel is an absurdity.