Summary: In Your Face! The car: BMW E39 530DTouring Year 2001, some 290,000 km away. The problem: At full throttle, the descendant ends in the fog, so thick soot. For this purpose at certain speeds The measure: bought LM 5128, with a full tank, and tank cleaner to run empty normally about 2/3, then refilled. Meanwhile yet 2x tanked. The result: no more soot, better threading, smoother running, lower fuel consumption. Savings: exchange or at least expanding and manual cleaning of injectors, so something between 100 and 1000th :-) Whether the environment is happy about that stuff, what comes during purification from the exhaust, the knowledge of the gods, but you remain in the future a lot of soot and me the indignation of backers and women spared) Super product, LiquiMoly !!