What does the term "fuel oil" refer to in Maine regulations?

The term "fuel oil," as defined in Maine regulations, specifically refers to a petroleum product used primarily for heating purposes, which commonly includes grades such as No. 1, No. 2, or No. 6 oil. This classification highlights the focus on types of oil that are utilized to provide heat in residential, commercial, and industrial settings.

Fuel oils are characterized by their viscosity and energy content, making them suitable for burning in furnaces and boilers to generate heat. The different numbers represent varying properties such as sulfur content and boiling points, with No. 2 oil being the most commonly used type in residential heating.

In contrast, other options mentioned refer to products not classified as fuel oils in this context. Vegetable oils are primarily used for cooking, lubricating oils are tailored for machinery operation, and motor oils are designed for use in automotive engines. Understanding these distinctions is crucial for properly interpreting Maine regulations related to heating oil and its applications.