Ok legal experts, here's the Utah laws I found about WMO…
___definition of a "diesel fuel" as per utah code title 59, section 13___
(4) (a) "Diesel fuel" means any liquid that is commonly or commercially known, offered for sale, or used as a fuel in diesel engines.
(b) "Diesel fuel" includes any combustible liquid, by whatever name the liquid may be known or sold, when the liquid is used in an internal combustion engine for the generation of power to operate a motor vehicle licensed to operate on the highway, except fuel that is subject to the tax imposed in Part 2, Motor Fuel, and Part 4, Aviation Fuel, of this chapter.
_______Tax rates accruing to title 59_13_201_______
59-13-201. Rate -- Tax basis -- Exemptions -- Revenue deposited in the Transportation Fund -- Restricted account for boating uses -- Refunds -- Reduction of tax in limited circumstances.
(1) (a) Subject to the provisions of this section, a tax is imposed at the rate of 24-1/2 cents per gallon upon all motor fuel that is sold, used, or received for sale or used in this state.
(b) In lieu of the tax imposed under Subsection (1)(a) and subject to the provisions of this section, a tax is imposed at the rate of 3/19 of the rate imposed under Subsection (1)(a), rounded up to the nearest penny, upon all motor fuels that meet the definition of clean fuel in Section 59-13-102 and are sold, used, or received for sale or use in this state.
Looks like to me they consider WMO a diesel fuel, and it's 24 1/2 per gallon to use it… Still, cheaper than any other fuel in Utah!
This is of course my personal opinion, but it's a class b misdemeanor so it's up to you to determine if one is more expensive than the other (use it, hide it, get caught or use it, pay tax, wave at nice policemen)
Saddest part of all this? It took me an hour to find the applicable verbiage. it took me 30 seconds to find a way to turn someone in for not paying tax on their fuels. Go figure.
It also means all my fun hippie friends that are burning veggie oil in their tanks are likely to have more trouble than us. Why you ask? It's hard to tell when we burn oil. it's black and smells like, well, diesel. My hippie friends? They smell like French Fries...