Exhaust system fluids

In Simple Terms

F1 engines must only expel fluids that actually entered the engine through the air intake and fuel injectors. The only exceptions are small accidental leaks and gases from the engine's ventilation system. This rule prevents teams from using the exhaust to dump unwanted substances.

• Only fluids that entered via the compressor inlet or fuel injectors can exit through the exhaust
• Minor leakage and breather system gases are permitted exceptions
• Teams cannot use the exhaust system to expel foreign or prohibited substances
• The rule ensures engine systems operate cleanly and within technical regulations