What is the empty weight of the aircraft, including oil?

In aircraft operations, the empty weight is the weight of the aircraft without any payload, passengers, or cargo but includes all usable fuel, oil, and necessary equipment. This weight is crucial for calculating various performance metrics like takeoff and landing distances, weight and balance, and fuel consumption.

The empty weight you identified as B (1,270 lb) suggests that this figure includes the total weight of the plane along with necessary operational fluids such as oil. Depending on the type of aircraft and its specifications, the inclusion of oil can significantly impact the overall empty weight.

When dealing with questions of this nature, it’s important to refer to the aircraft's Pilot's Operating Handbook (POH) or other detailed specifications provided by the manufacturer, as they will provide the most accurate empty weight. Thus, recognizing that the provided answer aligns with regulatory standards for defining empty weight is vital.