Stop in for a cup of coffee

was talking with one of th efarmers at the market on Sat about whether his truck had a second tank he could use for a running grease/left over cooking oil etc. A) His Dodge did not. B) When he looked into it, actually a lot of hassle to do it including additives required and paying road tax on the fuel. I hadn't thought about that. People I've known doing it weren't hauling produce etc. I can see not worth the hassle (or risk not following the rules) for him.