W210 m111.942

310k km onboard. Currently using Motul 5w40 x-cess. Summers hits 40-45°C and winter rarely hits -20°C( i go to faculty wich is in mountain area) What oil should i use? Seems abit thin for summer. Thanks! No strange sounds in engine yet and i want to keep it like this.

310k km onboard. Currently using Motul 5w40 x-cess. Summers hits 40-45°C and winter rarely hits -20°C( i go to faculty wich is in mountain area)
What oil should i use? Seems abit thin for summer. Thanks! No strange sounds in engine yet and i want to keep it like this.

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