Engine oil W221 S350L V6 CGI Blue Efficiency

[mike9956]

Hi Good Day !!  I was offered to use Mobil-1 5W50 FS X1 (Excellent Wear Protection - Rally Formula) and further top up with Liqui Moly Ceratec for smoothness and power. Currently, using Shell ultra helix 5w40 , clocked 156kkms. However, it feels sluggish during pick up 20 to 50km range. Workshop recommends I switch to above 5W50 and top up. Welcome any insight on its effectiveness or experiences in this matter.

thanks..mike

[gasoline]

I normally used the engine oil from Mercedes with Petronas marking - u should consider 

[mike9956]

Hi, my workshop recommends i use liqui moly Ceratec as an additive after each servicing and effective for about 8000kms. I have been happy using it as engine is smoother and quieter.