Oil Distribution

1. Pressure Lubricationa. Plain bearingsb. Main bearingsc. Main rod camd. Crankshafte. Rocker armsf. Lifters

2. Splash Lubricationa.

3. Spray Lubricationa. Roller and ball bearingsb. Gear reduction systems

4. Splash and/or Spraya. Cylinder wallsb. Pistonc. Valves

1. Lubricationa. Wet Sump

i. Oil is stored within the engineb. Dry Sump

i. Oil is stored external to the engine in an oil tank

Scavenge Pump: 300 times greater capacity than pressure pumps.

Return oil takes up more space because 1. It’s hot and 2. It’s been aerated.

Ashless dispersing