[CamaroFred]

Formula 1 rules were updated for the 2018 season to limit oil consumption to ~1 quart/100 miles.


Why does an F1 engine consume so much oil? Simply, more power.
A lot of it is used for cooling, spayed onto the undersides of the pistons where it evaporates. This allows the use of lighter pistons.

Oil is allowed to bypass the rings; oil is flammable and fuel consumption is limited, so burning oil produces more power than fuel alone. Looser rings reduce friction.

Oil exiting the exhaust helps to cool the turbocharger.


Increased clearances are common on some engines, especially for commercial vehicles. Trucks, taxis, police cars. They will all use more oil than passenger car engines. But they can run hot for days on end.
Cold starts and easy driving on those engines will contribute to oil consumption.