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Discussion Starter #1 (Edited)

My Peugeot 406 is a 2001 petrol automatic.
It's in beautiful condition. No Oil leaks whatsoever
and lots of power.
However I notice that at 2000rpm the engine sounds a bit rough.
So I am gathering it has a bit of wear as this is where the car drives most of the time 2000rpm.
The car has 195000km on the clock.

I am using Castrol Magnatec 5w40 at the moment.

Would it be a good idea to try a 5w50?
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