Zotye T200 vibrates and hums after driving 50 yards.

Maybe the throttle needs cleaning. It is recommended to go to the 4S shop for further inspection.

I can't generalize. According to my past experience, I feel that there should be carbon deposition. If the jitter is serious when idling, the throttle may be dirty. Cleaning it up should solve it. There is a feeling of insufficient power and constant jitter during driving, which may be the problem of fuel injector and oil circuit.

Of course, there is another possibility that there is something wrong with the oil you added. I suggest you check it out. I guess it's not a big problem.