to all the sifu here, asking for opinion.

My civic has a engine oil leak recently , visible on the right side of the engine (when looking at the engine from front of the car with the hood opened).

SC has fixed the oil leak (they explain is some gasket not good) , but since then the car stumbles a little when let go of the accelerator pedal at 40 KM/h

And it has very obvious stumble when let go of the accelerator pedal and then accelerate when car is moving at about 100 KM/h

Shall i being the SC people for a test drive and explain to them ? Or expect them to say "is normal" ?

Is there any way can plug in a laptop and read the engine readings and argue with them ?