ABSTRACT
The topic of this project is the “selection of lubricating oils for varied engines performance”. The aim is to specify the adequate lubricating oils for different engines. Using some equipment like hydrometer, flash point tester, and visometer, the proportion of lubricating oils like specific gravity, flash point and viscosity were found. These analysis were carried out on four different kinds of lubricating oils and the variation in their properties were observed.
It was found that different engines uses different lubricating oils. The selection of these lubricating for the chosen engines are based on the following factors:
1. the design of the engine
2. its operating conditions
3. the fuel it uses and
4. the period of invention of the engine.
Moreover, the manufacturer of the engine specify the lubricating oil the particular engine will use since they have profound knowledge of the factors above.
CHAPTER ONE
1.0 INTRODUCTION
1.1 DEFINITION OF LUBRICATING OILS
Lubricating oils are those heavy fractions of fractional distillation of crude oil which is blended with additions and which are used to reduce friction between moving surfaces. They are distinguished from other fractions of crude oil by their high boiling point [which is greater than 4000c] and their high viscosity.
1.2 TYPES OF LUBRICATING OILS
1. automotive lubricating oils
2. industrial lubricating oils
Automotive lubricants are the fluid films applied mostly to the automotive parts it comprises of the following:
1. engine oils [petrol and diesel]
2. hydrolic oils
3. compressor oils
4. gear oils
INDUSTRIAL LUBRICATING OILS
Industrial lubricants are those lubricants that are used in heavy industrial equipment. It includes
1. heat transfer oils
2. transmission oils
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