Engine sounds different after oil change?

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///AMG55

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Apr 14, 2013
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Car
w124
Hi all,

I have a 2004 S500 (m113 engine) and did an oil change yesterday.

Have been using shell 5w40 fully synthetic oil for years. But yesterday, I switched to Motul 8100 5w40 100% synthetic.

I noticed that the car runs better but the engine sounds louder than usual in high RPM ranges (3500 +) and when accelerating hard from a stop.

Initially thought that it was the exhaust that became louder. But realised that the louder (deeper "v8") sound comes from the engine.

Would appreciate if anyone could help.

Thanks
Jake
 
While I can't see why it would make a difference to the noise levels, the distinction between the two oils is that Motul 8100 employs a true synthetic PAO base (group 4) while Shell Helix Ultra is a GTL based oil derived from natural gas and is usually considered a group 3+. Both are really excellent oils.
 
Probably one of those snake oil thick gloops that clogs oil filters ?
 
All engine's sound sweeter after an oil change....Fact.
Tony
 

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