Unexpected question while showing off Tesla to a mechanical engineer

After lunch, D. Jones, a mechanical engineer, had somewhere to go so we did a static walk-around and driver seat tour. But at the end, he asked "What about hydrogen?"

So I answered:

• The hydrogen has less energy than what was used to manufacture ... about 75% less.
• Hydrogen from electrolysis is even less efficient than steam reformulated methane.
• Anhydrous ammonia makes more sense with less pressure and 3x the amount of hydrogen per mole.

I spoke with his lady friend back in the restaurant who asked about what happened. I pointed out that because we both were trained in mechanical engineering, I enjoyed technical talk without have to educate each other. I sure wish he'd had 30 minutes for a proper Tesla test drive.

Bob Wilson