I'm assuming the purpose of developing a more efficient engine is to reduce emissions and thus "saving the planet"? That may seem commendable, but from what I have read it is actually a wasted effort, unless you can make it 99%+ more efficient (which you cannot). So, even if this engine is all that it claims (which most other comments here seems to question), it still uses oil and therefore is part of the problem and not the solution. (Wrote abit about this a while back with more references: http://torkeldanielsson.se/reducing-emissions-is-not-enough)
Edited comment: Man, I don't get hacker news... Why do you downvote this? I thought I was adding a valid and important point - that an increase in efficiency is fighting the wrong battle. I even added references via link. I would be super happy if I could be informed of what in this post is offending or off topic!
Edited comment: Man, I don't get hacker news... Why do you downvote this? I thought I was adding a valid and important point - that an increase in efficiency is fighting the wrong battle. I even added references via link. I would be super happy if I could be informed of what in this post is offending or off topic!