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Hey OP. tough question. Maybe miss fires. That will typically feel like lost power in the higher RPMs especially with turbo cars.
I would have a local shop that you know of or you yourself if you want to spend te money on tool to run diagnostics while driving.
Also depends on how frequently you change your oil, do a spark plug change, possible fuel injector clean, etc...
Those are just some quick reference points that come to mind.
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