TERM – 2ND TERM
WEEK FIVE
Class: Senior Secondary School 3
Age: 17 years
Duration: 40 minutes of 5 periods each
Date:
Subject: AUTO MECHANICAL
Topic: ADDITIVES AND TYPES OF COOLING SYSTEM
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
I.) Define oil additive
II.) Identify common oil additive
III.) Identify the importance of oil additives.
INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source
INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,
INSTRUCTIONAL PROCEDURES
PERIOD 1-2
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PRESENTATION
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TEACHER’S ACTIVITY
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STUDENT’S
ACTIVITY
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STEP 1
INTRODUCTION
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The teacher explains the meaning of oil additive and identify the common oil additives
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Students listens attentively to the teacher
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STEP 2
EXPLANATION
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Teacher discusses the importance of oil additives.
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Students exhibit attentiveness and active engagement
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STEP 3
NOTE TAKING
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The teacher writes a summarized
note on the board
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The students
copy the note in
their books
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NOTE
ADDITIVES AND TYPES OF COOLING SYSTEM
Oil Additive
An oil additive is a chemical compound added to engine oil to enhance its performance or provide additional benefits beyond what the base oil alone can provide. These additives are formulated to improve lubrication, protect engine components, and extend the life of the oil and engine.
List of Common Oil Additives
- Viscosity Index Improvers: These additives help stabilize the viscosity of the oil over a wide range of temperatures, ensuring proper lubrication and protection in varying operating conditions.
- Detergents and Dispersants: Detergent additives help keep engine components clean by preventing the buildup of sludge, varnish, and other deposits. Dispersants help suspend and disperse contaminants, preventing them from forming harmful deposits.
- Anti-Wear Agents: These additives form a protective film on metal surfaces, reducing friction and wear between moving parts. They help extend the life of engine components such as pistons, rings, and bearings.
- Anti-Oxidants: Anti-oxidant additives help prevent oil oxidation, which can lead to the formation of sludge, varnish, and other harmful deposits. They help maintain oil stability and extend its useful life.
- Friction Modifiers: These additives reduce friction between metal surfaces, improving fuel efficiency and reducing wear on engine components. They can also help reduce noise and vibration.
- Pour Point Depressants: These additives lower the temperature at which the oil begins to solidify or gel, improving cold-start performance and flow at low temperatures.
Importance of Oil Additives
- Enhanced Performance: Oil additives improve the performance of engine oil by providing additional benefits such as improved lubrication, better wear protection, and increased stability over a wide range of operating conditions.
- Extended Oil Life: By reducing wear and preventing the buildup of harmful deposits, oil additives help extend the useful life of engine oil, allowing for longer drain intervals and reduced maintenance costs.
- Engine Protection: Oil additives provide added protection to engine components by reducing friction, preventing wear, and keeping critical parts clean. This helps extend the life of the engine and maintain its efficiency and reliability.
- Fuel Efficiency: Certain oil additives, such as friction modifiers, can help improve fuel efficiency by reducing friction between moving parts and optimizing engine performance.
- Environmental Benefits: Oil additives that help reduce emissions and improve fuel efficiency contribute to lower greenhouse gas emissions and reduced environmental impact.
EVALUATION: 1. What is oil additive?
- Identify 5 oil additives you know
- Mention 4 importance of oil additives
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively
