Just gonna throw stuff in quotes and follow/trace my numbering.
Also, not intending to be corrective or preachy, just throwing out what I know/opinion.
(1) I have no idea what sort of projections his calculations take into account, but a savings is a savings. The better question is probably what will this push for increased efficiency do to vehicle prices? That answer, I have no idea.
(2) I read an article last late week or early this week saying that one of the contributing factors to continuely increasing prices (at least for the moment) is that global capacity for oil production is fairly close to max capacity in places like Saudi Arabia and other big oil producers. So while we may have more than enough actual oil (for a little while anyway), if we can't refine it fast enough, you have a classic supply shortage.
This is the cynic in me but,
(1) Incorrect
(2) Nope
(3) Yup
(4) I don't think we stopped.
Follow the money, you will find the true masters.
If fiscal policy were better, I bet monetary policy would not have to be trying to pick up so much slack.
Annnnd....$3.94 for me. Blarg....