Which engine oil to use with increased oil consumption?

In my opinion, an exact oil measurement is a bit difficult, but my Mercedes E class E200 (w211) built in 2008 with compressor engine to have determined an oil consumption of approx. 0.75 to 1 L on 4000 – 5000 km, regardless of the driving profile whether short or long distance. To me the consumption of an engine that just 5.5 L oil as filling quantity has something high. According to operating instructions 0.75 L on 1000 km are in, but such values write yes The car has always been filled with a 0W40 since the last change with a 5W40 from Liqui Moly, but I mean the Liqui Moly does not produce any bad oils. I like to read this in different forums about a 10W40 with higher oil consumption. Unfortunately, I don’t have any experience with the 0W40 oil because I bought the car with 90,000 km. What are you looking for here? e Opinions of the experts again fill a fully synthetic 0W40 or switch to 10W40? 10W40 I get cheap with my friend and could even prefer the change at the cheap price from 20,000 km to 15,000 km. Greetings and thanks