How about WD 40 ?
Apparently scientists are work9ing on several types of fuel for the future:
Liquid Hydrogen
Liquid Methane
Liquid O2
Of which two of these are already used widely in rockets.
I think I also heard about nuclear, but it would be disatrous if something went wrong.
Don't worry, 20 years ago no one would think we would all have our own small WAP and SMS enabled digital GSM mobile phones with voicemail and an expensive range of covers to change the appearance of them.
I am sure the boff's at Oxford can sort it out!
Tri