There's mounting evidence suggesting the looming conclusion of Renault's Formula 1 engine operations.

Recently at Silverstone, Toto Wolff confirmed he has had "exploratory discussions" with Alpine representatives regarding a possible customer relationship with Mercedes engines for the upcoming regulatory cycle starting in 2026.

"Only when they have taken the strategic decision, do they want to continue with their Formula 1 engine program or not, we would dive into our agreements," remarked the Mercedes chief.

The latest indicator that Renault might indeed discontinue its operations is Audi's entry into an "exclusive sponsorship and technical partnership" concerning fuels and lubricants with BP and Castrol.

BP and Castrol, who are presently collaborating with Alpine on technical and car livery deals, are poised to shift their allegiance.

"BP Castrol will probably supply Audi exclusively," Auto Motor und Sport reported. "There is still a contract with the previous partner Renault, but in Paris the signs currently point to an end to the company's own engine development."

With Alpine already approaching Mercedes and Red Bull Powertrains for client engines, the Enstone based team would then need to adopt their fuel and oil affiliates.

The emphasis on fuel will become particularly paramount in 2026 with the transition to eco-friendly fuel sources.

In a joint statement, BP and Castrol announced, "bp to develop FIA-specified Advanced Sustainable fuel for Audi's entry into Formula 1 in 2026."

"Castrol to develop lubricants for Audi's V6 turbo engine and EV fluids for the electric motor and battery," the declaration further stated.

Adam Baker, Audi's F1 CEO, shared, "The combustion process is highly complex and can only be optimised by developing the engine in combination with the fuel properties." body check tags ::