W212 E63 6.2

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Should be either 0W40 or 5W40. If they used 30 they're doing it wrong, unless it's a different specification in the E Class but I can't see why it would be.

There was a sort of bulletin suggesting 5 instead of 0 during the life of the C63. The M156 is known to have noisy lifters on startup until they fill with oil. Using 5 means the oil is thicker when cold and helps it cling to engine components.

In short, I'd suggest using 5W40. May as well get the official Mercedes oil as it's well priced.

 
Should be either 0W40 or 5W40. If they used 30 they're doing it wrong, unless it's a different specification in the E Class but I can't see why it would be.

There was a sort of bulletin suggesting 5 instead of 0 during the life of the C63. The M156 is known to have noisy lifters on startup until they fill with oil. Using 5 means the oil is thicker when cold and helps it cling to engine components.

In short, I'd suggest using 5W40. May as well get the official Mercedes oil as it's well priced.

Thank you. I thought so that 5W40 was the right grade. I wonder why the main dealer used 5W30 before. They used 229.5 so the spec is right but the grade seems not too right.
 
Thank you. I thought so that 5W40 was the right grade. I wonder why the main dealer used 5W30 before. They used 229.5 so the spec is right but the grade seems not too right.
My w203 c320 had a one year flirt with 0w30 Mobil 1, based on Merc recommendation. Maybe 3 or 4, maybe 5 years ago. It had Mobil 1 0w40 every year before, and every year after, mainly because after the 0w40 to 0w30 and back to 0w40 Merc recommendation debacle, I decided way to go was stick with 0w40 Mobil 1 and ignore Merc future recommendations, as was factory fill at the time I believe (2004 in this case), and my suspicion was that Merc were faffing around based on something related to either group emissions or whichever oil company was giving Merc the best deal.

My recommendation would be either Mobil 1 0w40, or whatever 0w40 or 5w40 comes at best price from Merc at the correct spec.
 
Thanks all. I checked with my specialist again and he confirmed he used 5W40 before in a M156, not 5W30. He will use 5W40 for my car as well.
 

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