5. Estimating Lubricating Oil Cost

Try these first

1. 1.

   What is the typical interval for lubricating oil changes?

   Hint

   Think about how frequently maintenance tasks are done.

2. 2.

   Why might lubricating oil need to be changed more frequently?

   Hint

   Consider the impact of the work environment.

3. 3.

   What is the recommended interval for lubricating oil changes under normal conditions?

   • 50-100 hours
   • 100-200 hours
   • 300-400 hours

   Hint

   Think about when typical maintenance is performed.

4. 4.

   True or False: The crankcase capacity affects the total quantity of lubricating oil consumed.

   • True
   • False

   Hint

   Consider how larger engines utilize oil.

5. 5.

   A construction site requires a hydraulic excavator operating at 400 hp with an oil change interval of 75 hours due to dusty conditions. If the consumption factor from the manual is 0.008 gallons/hp/hour, estimate total oil usage in gallons over 150 hours.

   Hint

   Remember to factor in the conditions given.

6. 6.

   If a company uses a 250 hp engine with a crankcase capacity of 12 gallons and runs it under moderate conditions with a consumption factor of 0.004 gallons/hp/hour, how often should they change the oil to prevent degradation?

   Hint

   Think about the recommended intervals discussed earlier.