Physics 101 - Perpetual motion, free energy, magnetic motor, cracking water to provide enough Hydrogen to power a car - all of them can not work.
The basic laws of the universe we live in prevent this and no amount of wishing, conspiracy theories or belief will make them work.
As a really really simple example - IF I were to invent a fuel-less motor I would be amongst the richest people on the world a few weeks later - All developing countries would have free energy and poverty would be non-existent.
None of these people ever make a scrap of honest income from these examples.
About the closest we can get to free energy is solar power and even that won't last forever.
The oil companies are not interested in preventing future development they welcome it as they know their raw material is limited.