Short routes are the motorist Greul ... to one of the fuel consumption is higher, on the other hand is formed by the condensation of oil sludge. After I had been looking after the oil level since September until the end of January never once (!), I got the big "P" in their eyes. Oil level: None ... Ok, then add oil ... auwei. A thick Schlamschicht peeked me out of the oil filler cap on ... With a lot of effort, I managed to remove a lot to bring the level up to "normal". Then useful information came from my local gas station, an oil change incl. Engine flush would be advisable. Tips from that, I also got from the "gas station". Okay then-new oil filter, oil plus this motor flushing ordered, my sets are pictured this: Liqui Moly 1092 MoS2 low friction oil 10W-40th After I had filled the 500ml of rinse, I let the engine about 15 minutes. it idle. Result: No more mud, everything clean! Conclusion: Suitable for extremely dirty engines, highly recommended! But would have been better but a regular oil check, from and "take the train" at times but to prevent such a thing.