Mark Gallagher, who led Cosworth Engines' return to F1 in 2010, believes an independent engine supplier solution is the way to go for Formula 1.
As the sport's managers devise F1's future engine platform beyond 2020, Gallagher believes an independent supplier would be in several teams' best interest.
Gallagher cites Red Bull but also McLaren as perfect examples of outfits which could gain from partnering from a dedicated supplier.
"I look at the struggles of McLaren and I look at the struggles of Red Bull," Gallagher told Sky Sports F1.
"And I think why are you struggling when actually there are providers available who, for a budget that you wouldn't even bat an eyelid at regarding aerodynamic development, you could actually begin the process of putting together your own engine programme.
"Red Bull Racing is hamstrung by the fact it doesn't have a works engine.
"Even though it has a very good and strong engine supply from Renault, Renault has its own Formula 1 team and you have to believe that ultimately that's their focus.
"Red Bull Racing should not play second fiddle to anyone on engine supply and I passionately believe they deserve to have their own unique supply of engines.
"Not just a customer engine, but an engine that is specific and bespoke to them.
"The reality is that that is such an important component in contemporary F1 and you can't just have a plug and play engine like some Duracell battery.
"You need something that is integral to the entire decision and is part of a concept."
Gallagher applies his same line of thought to McLaren, whose partnership with Honda is in tatters after three years of dismal performance and reliability.
"Let's be clear: McLaren want Honda's money as much as they want Honda's engine. Obviously an independent supplier will not be supplying bundles of cash.
"But you have to say to yourself 'at what point does the trade-off of not scoring World Championship points and ending up with much less prize money counter the fact that you're being paid money by the car manufacturer?'"
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