I was having some fuel problems switching from fuel oil (don't tell!) to the new ULSD. My filters clogged and left me stranded a couple of times. Managed to get it going on the side of the road so all was not lost. The filter was full of little chunks of black crud.

Started adding LE (Lubrication Engineers) BTU and found it easier to start, less smoke, smoother idle and more power. I don't keep up with my fuel mileage so I don't know if it increased. Overall this stuff has been great, especially the easier starting during the cold spell we have had in the northeast.

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Doug

1987 300TD x 3
2005 E320CDI