Here are some of our favorite links:

Weekly retail on-highway diesel prices from the EIA:

http://tonto.eia.doe.gov/oog/info/wohdp/diesel_detail_report.asp

FMCSA system:

http://li-public.fmcsa.dot.gov/LIVIEW/pkg_html.prc_lisearch

SAFER system:

http://www.safersys.org

Oilfield terms glossary offered by Schlumberger:

http://www.glossary.oilfield.slb.com/default.cfm

Steel pipe and tubing weight calculator:

http://www.steel-pipes-tubes.com/steel-pipe-weight-calculator.html