However, F1 regulations permit up to 12 teams, and Ben Sulayem believes there are potential benefits to welcoming new car manufacturers to the sport.
"The FIA should be asking, begging, OEMs to come in," he said. "We should not just say 'no' to them.
"If you say: 'What is my dream?' It is to fill up the 12 [team slots] and to have one US team from an OEM and a [power unit] and a driver from there. And then go to China maybe and ask for the same thing and do it."
"The circuits are supposed to have enough garages and space for 12 teams," he added. "I think the number of races is too much [rather] than the number of teams. We need more teams and fewer races."
Current F1 teams, without decision-making power on new entrants, oppose the idea due to financial concerns, as it would reduce their prize fund share. New entrants must pay a $200 million anti-dilution fee to compensate existing teams, but they argue it should be closer to $1 billion given F1's increased success.
Despite the budget cap introduced two years ago, some teams still face financial challenges, and it wasn't long ago that half the grid was financially precarious. Smaller teams have negotiated a larger infrastructure spending allowance to compete with top teams.
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