With a rapidly expanding grid and only four engine suppliers left in the series, the burden on each is getting mighty heavy. Renault only supplies its own team and Red Bull, but four teams are running under Cosworth power, three under Ferrari and another three run Mercedes engines. Those parameters are expected to change next season as Red Bull looks for alternatives to Renault engines, which have proven an unreliable liability so far this season, and have been known to be keen on Mercedes power. But at least one team principal thinks having the same engine as his main rivals would be a big mistake.

That one team principal is Ross Brawn, mastermind of numerous world championships. Thing is, Brawn's not the head of just any customer team. He runs Mercedes' own F1 effort, which runs the same engines as those that the German manufacturer supplies to both McLaren and Force India. Hardly amenable to offsetting his employers' considerable costs, Brawn has said that Mercedes should think "long and hard" before even considering supplying engines to a fourth team. And there's little doubt as to who he's referring to.

[Source: Autosport]

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