farm diesel is dyed and so it has no road taxes paid on it. If caught you will be fined for what they think you might have used on the road. Which from what I have been told can be quite pricey but I have never met anyone face to face that has been dipped or checked for use of off road diesel. So there is effectively no difference between off road diesel and on road diesel other than I think the off road stuff is still a high sulfur fuel which our IDI's were designed to run on.
Now for mixing in used motor oil - not a problem - just filter it and enjoy. Just make sure that it doesn't have water in it and you'll do fine. Some say that it cokes up the injectors but I did not see that happen in my 5.9 Cummins adn trust me I ran tons of it through it along with tons of used cooking oil (veggie oil) and all I ever did with used motor oil was just filter it before putting it in the tank - now for the used cooking oil - I dewatered it first by bringing it up to temp to boil off water adn then filtered it. I'm actually doing the same thing on this IDI and not looking back.
I will tell you when you break over about 30% oil ratio that the motor will actually quite down some (the diesel rattle subsides) it's kinda amazing when you drive up to the diesel pump and have it running while you are filling and get the ratio down and the engine just all of a sudden starts making it's normal rattleling sound....
But you'll do just fine with what you are doing as long as the feds don't catch the dyed fuel - they couldn't care two flips less about the used motor oil...
But you'll do just fine with what you are doing as long as the feds don't catch the dyed fuel - they couldn't care two flips less about the used motor oil...
In this state, it's hard enough for them to get people to buy tags and insurance. Any guilt I might feel from using homemade bio disappears quickly when I hit the thousands of potholes I drive over every day. I know, it's probably the missing tax revenue from MY fuel that would give them enough $ to fix the road, but more likely it would end up paying for some bureaucrat's new car or something. It sure ain't going to the roads.
I think the fairest way to do it is to eliminate all taxes on all fuels right now and charge people by the vehicle weight and mileage per year, which can be paid monthly, quarterly or all at once. I HATE paying taxes but if I'm honest, I was stealing use of the road for the first couple years when I got into biodiesel and it really didn't sit well with my conscience. It is a fair tax because you use the road you pay, you don't use it, you don't pay. They make it hard to do the right thing though for BD and other alternative fuels people. I worried I might get into more trouble for reporting what I was doing than just to keep on doing it on the sly.
That's exactly what happens in Cali. My wight fees on my trucks range from $150, up to $1000 depending on the truck. Then on top of it we get hit with 68 cents per gallon or so in fuel tax. Not saying I am doing it, but half red, and black oil makes black diesel. been there seen that. Like the moon shiners say F the revenuers. I am tired of paying tax on top of tax, on top of more tax. But I love sunshine, and business so I stay here in the place called Kalifornia.