Well I was ready to go back to the Legislature again this year to try to get WVO as a fuel exempted from road use taxes, but I do not have to. Representative Dan Roach's administrative assistant contacted the Department of Licensing or Revenue and was emailed the following response.
Administratively we accept Waste Vegetable Oil as “biodiesel” even though the exemption states: “(k) Waste vegetable oil as defined under RCW 82.08.0205 if the oil is used to manufacture biodiesel.” The manufacturing v. processing to use WVO was not significant and the intent of the law was to exempt the WVO. We do exempt the WVO from tax as long it is for personal use only. The WVO sold as a fuel is subject to tax.
We are exempt for road use tax, that is a wonderful thing.
Here is the link to the bill that passed and became effective on July 1, 2008.
http://apps.leg.wa.gov/billinfo/summ...3188&year=2007