FORT LAUDERDALE, Fla.–(BUSINESS WIRE)–SIXT USA, a subsidiary of Sixt SE, a global leader in premium mobility services, today announced the extension of its popular member-exclusive fuel offer through June 30, 2026. Originally launched in May to provide relief as gas prices climbed, the flat-rate $49.99 pre-paid fuel tank is available across all vehicles and all U.S. states for qualifying rentals — and with summer road trips and travel at their peak, SIXT ONE members can continue to lock in fu