mowermech wrote:

"Moral of the story is you cant fill up and forget it thinking your covered, because you might not be."

Well, Yes, I can, because once the hay is in, the truck rarely gets used, and when I do need it, I can wait for a warm day (relatively speaking, as in above minus 18, which is the cloud point of the fuel that is available).

Also:
"Sulfur is not a lubricant in of itself, but it can combine with the nickel content in many metal alloys to form a low melting point eutectic alloy that can increase lubricity. The process used to reduce the sulfur also reduces the fuel's lubricating properties. Lubricity is a measure of the fuel's ability to lubricate and protect the various parts of the engine's fuel injection system from wear. The processing required to reduce sulfur to 15 ppm also removes naturally-occurring lubricity agents in diesel fuel. To manage this change ASTM International (formerly the American Society for Testing and Materials) adopted the lubricity specification defined in ASTM D975[12] for all diesel fuels and this standard went into effect January 1, 2005.[13] The D975 standard defines two USLD standards, Grade No. 2-D S15 (regular ULSD) and Grade No. 1-D S15 (a higher volatility fuel with a lower gelling temperature than regular ULSD).

The refining process that removes the sulfur also reduces the aromatic content and density of the fuel, resulting in a minor decrease in the energy content, by about 1%. This decrease in energy content may result in slightly reduced peak power and fuel economy."

If it is good enough for ASTM, it is good enough for me.

JPhelps wrote:

My snake oil of choice is TCW-3. I don't know if it works in a diesel pump but I do know that little two stroke engines can run for thousands of hours with zero oil pressure if they put this stuff in the gasoline.