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Oil and Oil Systems

Oil and Oil Systems. Purpose of Oil. The purpose of oil is to… reduce friction . Friction: is the resistance to motion created by 2 metallic objects rubbing against each other resulting wear on the materials and producing heat as a by product.

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Oil and Oil Systems

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  1. Oil and Oil Systems

  2. Purpose of Oil • The purpose of oil is to… reduce friction. • Friction:is the resistance to motion created by 2 metallic objects rubbing against each other resulting wear on the materials and producing heat as a by product. • Example: the brakes on a car when you press the brake pedal you are causing the brake pads to rub against the rotor causing friction and slowing the car down.

  3. Types of Oil • There are several different types of oil but in typically small engines use either synthetic or conventional oil. • Synthetic- has chemical additives to improve the composition, results more expensive, yet more efficient • Conventional- petroleum based (pumped from oil wells) no additives involved is cheaper

  4. Oil Ratings • Oil is rated by its viscosity • Viscosity:is thickness or thinness of a liquid. • Example: Water has a low viscosity, maple syrup has a high viscosity. • Engine oil must be thin enough during cold temperatures yet thick enough with high heat conditions. • Two ratings: • SAE 5W-30 Rating at 212 F (high temp. rating) • SAE 5W-30 Rating at 0 F (low temp. rating)

  5. What does this mean?

  6. What does each API rating mean? 2 3 1 4 5 6

  7. Thick Oil vs. Thin Oil • Thick oil is used to protect against extreme temperature, reduces fuel economy. • Thin oil is used because it aids in cold engine starting, improves fuel economy.

  8. Your Assignment • Define the following oil systems • Splash lubrication • Barrel pump pressure lubrication • Full pressure lubrication • Draw a picture and label the parts of all three systems. • Next in a short paragraph describe how EACH of the three systems work.

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