Which type of diesel is anticipated to be more expensive and less fuel economical than conventional diesel?

Answer: B — Ultra Low Sulfur Diesel

Ultra Low Sulfur Diesel is considered to be more expensive and less fuel economical than conventional diesel due to the stringent refining processes it undergoes to reduce sulfur content. This type of diesel is mandated by environmental regulations to significantly lower emissions of sulfur oxides, which are harmful to both health and the environment. The increased production costs associated with refining ultra low sulfur diesel can lead to a higher retail price at the pump. Additionally, while ultra low sulfur diesel can benefit certain modern diesel engines and help improve emissions, it may not deliver the same fuel economy in every vehicle compared to regular diesel. Thus, the combination of higher production costs and the potential for slightly reduced fuel economy contributes to the overall expectation of ultra low sulfur diesel being more expensive and potentially less fuel economical than conventional diesel options.