kütusevaru

Kütusevaru is the term for reserve fuel, the amount of fuel kept beyond the expected consumption to cover uncertainties, disruptions, or emergencies. It serves to ensure continuity of operation when supply is interrupted, when detours are necessary, or when demand exceeds forecasts. The concept applies across transport modes and industrial contexts, and the exact amount considered as reserve depends on the sector, regulations, and risk assessments.

In road transport and consumer vehicles, kütusevaru refers to the fuel remaining in the tank when the gauge approaches empty. The specified reserve level is influenced by vehicle design, safety margins, and local rules. Consumers may rely on the built‑in reserve in a tank, or on declared reserve policies for fleets and commercial operations, with the actual amount varying between models and jurisdictions.

In aviation, reserve fuel is a formal element of flight planning. It typically includes trip fuel, contingency fuel to handle unforeseen conditions, alternate fuel for a different destination if needed, and a final reserve to cover extended delays. Regulatory minima for reserve fuel differ by country, aircraft type, and operation, and airlines must document and monitor compliance as part of safety procedures.

In maritime transport and other heavy industries, reserve fuel serves similar purposes: it provides a buffer against weather, routing changes, and delays, while adhering to safety and environmental standards for fuel storage and handling.

Calculation and management of kütusevaru involve estimating expected consumption, planned routes or schedules, weather, potential delays, and applying appropriate safety margins. Overly large reserves increase weight and operating costs, while insufficient reserves raise risk. Storage and handling require compliance with fire, environmental, and safety regulations.

See also: fuel efficiency, strategic petroleum reserve, aviation fuel, reserve fuel.