Day 37 Sheet

Name the 9 functions of oil.

• lubrication
• extreme pressure wear control
• cleaning
• protection
• cooling
• sealing
• shock-damping
• hydraulic action
• oil additives

Name 6 oil contaminates.

• combustion by-products
• acids, varnish, and sludge
• abrasives/foreign material
• fuel or coolant
• soot
• environmental

Name 9 sets of data that must be included in oil analysis.

• Engine modl and serial #
• Miles and hrs of oil use
• Miles and hrs on engine since new or since rebuild
• Oil used (brand name, performance catagory, and viscosity grade)
• Date sample was collected
• Engine application
• Amount of new oil added since previous oil change
• Any recent engine maintenance
• Analysis of new unused oil

Briefly describe the 2 methods that can be used to collect oil samples.

1. Take the sample from a pessurized port while the engine is idling and warm (this method makes sure the oil sample is not stagnant and represents the actual homogeneous oil mixture that is flowing through the engine.)
2. In case engine is not operational, use a vacuum to draw a sample out of the oil sump (this sample should be obtained asap after stopping the engine so the oil is still warm and strtification has not occured.)

Note to self:
    Stratification- The process of stratifying something, or the state of being stratified.
    Stratify- To form something into a layer(s), or become formed into a layer(s).
    TBN- Total Base # (chemiacl analysis)
    TAN- Total Acid #

Summaize what you have learned from Appendix A doc.