Questioner: Paula Tsui answered me 1.5 It's been almost ten years since manual exercise. Let me answer your question. 800 rpm at idle speed; Driving: the automatic gear will automatically match the speed; Manual gears vary from person to person. The economizer will shift gears at 1500 rpm, but this method will easily lead to engine overload at low speed. My suggestion is 2000 rpm, which is the balance between fuel consumption and power, which is what everyone calls the best speed. Actually, I still want to say one thing. Don't stick to speed. When you feel that your motivation is not enough, you should speed up or even downshift to improve your motivation. Don't go uphill or something, it will do great harm to the engine.