Which of the following is NOT a rule to remember when using gasoline?

Using oil absorbent for gas spills is not specifically a rule directly related to the proper storage and handling of gasoline. The primary focus when dealing with gasoline includes safety measures that prevent spills in the first place and ensure proper handling to minimize risks associated with fire or explosion.

Using a proper storage container is essential to prevent leaks and ensure that gasoline is stored safely. Storing gasoline away from direct sunlight is important because heat can increase the pressure in the container and lead to potential hazards. Keeping gasoline away from ignition sources is critical to prevent fires, given that gasoline is highly flammable.

While oil absorbent materials are useful in managing spills and can help mitigate accidents if they occur, they are not a foundational rule for the safe usage or storage of gasoline itself. This makes the choice regarding oil absorbent for gas spills the correct answer in this context.