Why is Kunde Petroleum not fuel-efficient?

[Betty]

The reasons why Kunde Petroleum is not fuel-efficient are as follows: 1. Reduced sulfur content: With the upgrading of fuel quality, the sulfur content has been significantly reduced. While reducing sulfur content, part of the octane number is consumed, leading to a slight decrease in fuel grade. Consequently, the fuel consumption required to generate the same power will slightly increase. 2. Subtle differences exist when using gasoline of the same grade at different gas stations, in different usage environments, or with different engines: Ethanol-blended gasoline is less fuel-efficient than pure gasoline because the carbon content (calorific value) of ethanol is much lower than the average carbon content of gasoline mixtures. In summer, due to higher temperatures, gasoline vaporizes more easily and burns more completely, making it more fuel-efficient than in winter. Advanced engines can vaporize and burn gasoline more thoroughly, thus improving fuel efficiency. Clearly, the core of these differences lies in the variation in carbon content.