linewarbr wrote:
Do NOT put off-road diesel in your tank. Not sure how it goes in PA, (more strict than down here, I imagine) but if a cop decides to check your tank for dye (the off-road is dyed, usually red) it is a HEFTY fine. The CRD can run on 500 ppm low-sulfur diesel - it is pre-2007 so it does not require 15 ppm ultra-low-sulfur diesel - but you never know what is in the off road tanks, since it is meant mainly for farm and construction equipment.
In most parts of the country Off-road diesel comes out of the same takeoff as ULSD at the refinery. It goes through the same pipeline to get to the distribution terminal where red dye is added. In a few areas there are reports that it is still S500ppm but I think that most folks would have a hard time finding that these days. It is too costly for the refineries to produce two separate diesel fuels instead of one ULSD line.
The statement that "you never know what is in the off road tanks" applies to road fuel tanks just as well. Farm equipment requires the same high quality diesel that highway vehicles do and in some cases, may even need cleaner fuel. Think about that $250,000 piece of harvesting equipment or that $1,000,000 construction crane, do you think that their owners can afford to have them in the shop for a week for an IP replacement during the work season?
I don't personally know of a single CRD owner who has been pulled over for a fuel check by the Highway Patrol, but I'd bet that not a single one of all the 11000 on the road has ever had their fuel checked. I'm not encouraging anyone to break the tax laws, far from it. I'm simply stating that it shouldn't be a concern if it somehow wound up in the tank. What I do for my cold weather fuel blend is, I use Off-road diesel to which I add a small amount of vegetable oil and filtered used motor oil. The vegetable oil makes it an "experimental" biofuel which requires no taxes and thus becomes road legal fuel, and it greatly improves the lubricity. The 1 liter of motor oil in 200 liters of the fuel blend obscures any trace of red dye in the fuel and also adds a small amount of lubricity, not because I'm not concerned about getting the Jeep's fuel checked but I use the same blend in my Ram, which the authorities are known to check once in a blue moon.