We just learned about the Motor Oil.
Another part of a car is the Oil Pump.
The oil that helps keep everything in the engine moving fast and slippery gets pushed through the car using an oil pump.
There are a few different types of oil pumps, but one of the most common is the gear pump.
For this type of pump, the gears spin around and help push the oil through the engine.
The gears are spun around using the power of the spinning crankshaft as it goes around.
(from: wikipedia - gear pump)
Kid Facts - Blast from the past: Steam Cylinder
