GE Aerospace has qualified NYCO’s Turbonycoil 600 synthetic turbine oil for the GEnx-1B, the engine that powers most of the world’s Boeing 787 fleet. The French lubricant maker announced the approval on October 26, 2026, following an in-flight evaluation with Air France that ran for more than three years.
The GEnx-1B is a significant addition to the oil’s list of approvals. GE Aerospace said in July 2026 that the engine had passed 50 million flight hours with more than 50 operators, and the GEnx family powers roughly two-thirds of the 787s in service.
The installed base keeps growing, with GE Aerospace’s February 2026 agreement set to make United Airlines the world’s largest GEnx operator and Philippine Airlines selecting the GEnx-1B for its incoming 787-10s in July 2026.
Air France trials logged nearly 7,000 flight hours
Air France ran the evaluation on several GEnx-1B engines across its Boeing 787 fleet for more than 36 months. Oil analyses carried out throughout the campaign showed the lubricant’s thermal stability and the performance of its antioxidant and anti-wear additives, according to NYCO.
After nearly 7,000 flight hours, engine teardowns and inspections found effective wear protection on lubricated components and low levels of coke deposits, the carbon residue that forms when oil breaks down at high temperature. Those results formed the basis of GE Aerospace’s decision.
“The oil has demonstrated excellent quality and performance throughout our in-flight evaluation,” said Olivier Boina, Vice President Engine Fleets Engineering at Air France’s engine department. “After the GE90 and the CF6, we are pleased to see it qualified for another engine in our fleet.”
NYCO expands its approvals across GE widebody engines
The GEnx approval builds on a global partnership that NYCO and Air France signed in September 2021. Under that agreement, the airline evaluated Turbonycoil 600 on its CF6-80 engines, and GE approved the oil for the CF6 and the GE9X in June 2023. At the time, Air France said the oil was in use across its entire Boeing 777, Airbus A320 family and A220 fleets.
“The qualification of Turbonycoil 600 for the GEnx-1B engines is an important step in NYCO’s expansion in the civil aviation sector,” said Paul Gallais, NYCO’s Business Development and Marketing Director, pointing to 40 years of in-service experience with the oil.
The Paris-based company has also been adding airline customers. In September 2026, NYCO signed a multi-year supply agreement with Japanese carrier Peach Aviation covering the CFM56-5 and LEAP engines on its Airbus A320ceo, A320neo and A321LR fleet. Peach is the first Japanese airline to select the oil.
The GEnx-1B qualification now opens the door to more Boeing 787 operators, a market that continues to expand as airlines such as flydubai bring GEnx-powered Dreamliners into their fleets.
