[Stonehorsw]

Hi,
Car is with 4900 miles, oil changed at ~1300 miles.

Background: This week the car started feeling gutless, specially on low rpm. Less power than my 18 Brz, not able to break traction even in turns.

Did not hear any knocking event or any type of other engine noise that would call my attention.

What I am suspecting: bad fuel quality (filled with 93 from Kroeger this time)

Question: How do I diagnose if this is related to the fuel? Any other had similar reduction of power/torque?