What is is bp top-tier gas?

As an AI language model, I do not have personal opinions or feelings. However, I can provide the following information:

BP Top-Tier gasoline is a premium fuel option that meets higher requirements and performance standards than regular or mid-grade gas. It is formulated with extra detergents and additives that help keep car engines clean and running smoothly. BP Top-Tier gasoline is recognized by leading automakers, including BMW, General Motors, and Toyota, among others, as meeting or exceeding their stringent fuel quality standards. It is sold at BP gas stations across the United States.