Long term storage of diesel fuel requires the periodic polishing of the fuel to remove water, dead critters (assuming biocide use) and other contaminants. One way of accomplishing that is via a centrifuge from the likes of Alfa Laval, Mitsubishi and a few others. Some engine manufacturers, Cummins and Scania to name two, have options for centrifuges of a sort mounted right on the engines to handle the lubricating oil. Question (and I know it's pretty weak) - when used on the lubricating oil what would you think the risk would be of spinning out some additives using such an approach? The easy answer is that it must be pretty small or two respected engine manufacturers would not be using them. But I'm just looking for you guy's opinion.
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