Correct tire inflation was discussed recently.  For some
non-Vanagon humor, go to
http://www.inflationdata.com/inflation/
and look at the Google ads at the top--one is "tire
inflation."  Google has a glitch....

For some Vanagon (well, non-diesel) content at that site:
http://tinyurl.com/e62ze
which has a nice chart on gasoline vs crude oil prices.

Richard
Boulder