Red diesel on vehicles on the roads?
I have not seen red diesel personally, because the people I know who run farms buy the usual road-taxed fuel and keep a tally of how much they buy for off-road use here in Texas (form 06-106) for a re...
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I don't know how you would determine if it is common or not; because most people that do it, would never admit to it (anonymously or not). I know plenty of farmers that run "tractor gas" in their cars.
