Service A - Dealer used 5w-40
I was under the impression that we should use 0w-40 synthetic. Should I be concerned about this? Could this have led to the increased idle vibraton (I can feel it through the steering wheel and near the front fender area)?
I was under the impression that we should use 0w-40 synthetic. Should I be concerned about this? Could this have led to the increased idle vibraton (I can feel it through the steering wheel and near the front fender area)?




Our dealer here is using 5W40 as well. It is easier to stock one type for all cars and the diesels specify 5W40. They are now buying oil in bulk rather than by quarts in the case. It would be too difficult and expensive to buy bulk oil in more than one viscosity. So we lose the ability to choose as result. Sucks!
I suppose you could demand 0W40 (10W40 Typo) but they would have to bring it in special and likely charge through the nose for it. I think in Canada it was an MBCan decision more than the dealers.
I can't think of a reason that the 5W40 would cause more cold engine vibration than 0W40 but it could be possible. The C63 specifies Mobil 1 0W40 or 5W40 so either grade should be acceptable.
Last edited by Mort; May 10, 2011 at 10:02 AM. Reason: Fix typo 10W40 should be 0W40
Is there any advantage to using 0w-40 over 5w-40? Also, when I need to top off the oil in the future, can I use 0w-40 even though the engine currently has 5w-40?
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Either one is fine, but I prefer 0W-40 myself.
5W-40 can operate down to -13 degrees, as where the 0W-40 can operate in temperatures below that.
0W-40 just offers a wider operating range then 5W-40, but both will work just fine.
Last edited by Yuille36; May 10, 2011 at 11:22 AM.
Shouldn't the oil level be closer to the second tab? Is this normal, or do I need to add some oil?



