Recently, I noticed that my car ( less than 7000km) is not responsive as before. Now, there is a noticeable delay moving from 0kmh. The strange thing is that the car is still fine after that, it runs just as usual when it starts moving. I feel that the hand break is partly on.
The only thing that suspect is that I refilled it from a gas station that I've never used. It looks a little bit old, might be bad gasoline issue.