What is the weight of oil per gallon?

The weight of oil per gallon is typically around 7.5 pounds. This measurement can vary slightly based on the type of oil and its specific gravity, but for common aviation oils that are used in maintenance and operational practices, this is a standard figure. Recognizing this weight is crucial for various calculations in aviation maintenance, such as fuel load calculations and weight and balance considerations for aircraft.

It's important to understand that the density of a fluid can affect its weight, and oil is generally denser than water (which weighs approximately 8.34 pounds per gallon) but this weight can be lower than that of other fluids. Using the accepted figure of 7.5 pounds per gallon ensures accurate planning and operations within aviation maintenance tasks.