What Causes Poor Fuel Efficiency?

[RubyMarie]

Below are the reasons for poor fuel efficiency: 1. Purchased gasoline may be adulterated with low-quality fuel, reducing its quality and combustion efficiency after refueling. 2. Gasoline may contain ethanol, which is a high-calorific fuel but has significantly inferior combustion performance compared to pure gasoline. 3. Cold weather affects vehicle performance, as slow engine warm-up leads to a richer air-fuel mixture, and low temperatures of both gasoline and air reduce engine power. Specific methods to identify gasoline quality are as follows: 1. Observe the color of the gasoline: Color is the most obvious indicator of gasoline quality. Dark-colored gasoline is poor, but extremely light color is not necessarily better. Generally, light yellow, transparent or semi-transparent gasoline is considered good. 2. Smell the gasoline: Strong gasoline odor indicates poor quality, often due to excessive sulfur content. Sulfur content is an important standard for judging gasoline quality. 3. Feel the gasoline: Dip your finger in the gasoline and rub it between your fingers. If the gasoline feels excessively oily, its quality is likely poor.