I know, I know, this is a
. But I felt the 7-series section needed a new post, and I found this article interesting ... especially the part that says "The tank's thermal insulation is so astoundingly good that BMW calculates a block of ice inside it would take 13 years to melt.
The technology is not perfect, but at least promising research in alternative fuels is being done. And I mean, what better venue for such research than a BMW 7er???