95,000km..?

Hell that's practically brand new. I'm around 215,000km on my 05 4.8iS.

Check all fluids for correct levels and check for cross contamination water in oil and vice versa and check your PCV valve for sludge as it sounds like you have someone's Sunday driver.

If all that's good then take a highway trip for at least a half tank out and then refuel and return and recheck fluids again, after that just chalk it up to weirdness. (But remember it)

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"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course