To sum up:
Proponents of 2T say that modern ULSD fuel lacks sufficient lubricant for the diesel pumps in older engines designed to run on Low Sulfur Diesel. Adding 2T makes their older engines run smoother and more powerfully, use less fuel, burn cleaner and their well-lubed diesel pumps pump diesel more happily. They cite a variety of reports, mainly from Germany, not all of them in the public domain, in support of their claim.
Some skeptics claim that the oil companies have already addressed the lubrication issue in ULSD and adding additional lubricant in the form of 2T is a waste of money. Others claim that 2T oil will shart diesel pump seals, clog injectors, gel up in cold weather, and otherwise cause more troubles than it solves, especially if used over the longer term. This side argues that if 2T were so great, oil companies would sell it as a high-priced fuel additive.
So does anyone here have an opinion or experience with this? Or have I unwittingly brought an Aussie debate, a bitter debate where no quarter is asked or granted, a debate that tears families apart and even drives the once-loving boards of public limited companies to civil war, to the peaceful shores of South Africa?
... But what a difference.... I noticed there was much less smoke and a much quieter motor !!!..... So I will continue to do this every second tank fill !!