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Does an automatic transmission car consume more fuel the slower it drives?

1 Answers

DiWilliam

07/30/25 8:52am

An automatic transmission car does indeed consume more fuel the slower it drives. Whether a car saves fuel or consumes more depends on road conditions, load, and speed. Driving slowly does not necessarily mean saving fuel, nor does driving fast necessarily mean consuming more fuel. It is related to the overall operating condition of the vehicle, such as high friction coefficients in some connections, overloaded weight, and the quality of the road conditions. Following the instructions in the car manual is the most fuel-efficient approach. Below is the classification method for car engine oil grades: 1. AB series: Oil for gasoline and light-duty diesel engines. 2. C series: Oil suitable for catalyst-equipped engines. 3. E series: Oil for heavy-duty diesel engines.

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