[MechEStudent]

Hydrogen has hard risks, and high costs. Density. Corrosion. Tunneling/leaking. A new trillion-dollar distribution infrastructure to replace the fluid-version we use for petrol.

What about methanol? We can convert hydrogen to hydrocarbon. Liquid is dense, much less dangerous, less acidic, less leaky, and our current trillion-dollar infrastructure already uses it as a substantial additive.

[dpark]

Methanol isn’t a common additive is it? Most (all?) gasoline in the US has ethanol added.

[DesertVarnish]

Methanol is commonly sold as "octane booster". It's definitely around.