How to remove Jetta carbon deposit?

J.J., regarding the question you asked, it is easy to produce carbon deposits when vehicles drive at low speed for a long time in urban areas. If you have time, it is recommended that vehicles run at high speed every month and drive at high speed for dozens of kilometers on the expressway or the expressway around the city. If it is not convenient to drive at high speed, you can use the method of low gear and high speed, and drive a few kilometers every day, for example, from three gears to 50 kilometers and from four gears to 70 kilometers. Driving at high speed often is good for the engine.

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