Lubrication isn't the problem with hydrogen fueled engines, it has to do with compression and timing. It's also different because you need a new fuel pumping system, your fuel pump can't pump a gas. But you could work on making hydrogen an additive, reducing the amount of gasoline injected and adding hydrogen, it seem like it would help emissions by reducing the total gasoline burned as well as reducing particulate and hydrocarbons by trapping them in H2O that forms from hydrogen gas combustion.

Also argon gas can be added to the hydrogen to make it more stable and prevent the hydrogen from damaging engine components.

I've got this old 1991 nissan than im gonna fuck around with. see if i cant get it to run on ethanol that i made.

then if i finally get some money i can build an electrolysis tank and figure out how to store it. then we could see how hydrogen fuels really work.