Engine Oil – 20 W4T – 900 ML

Description

🧪 1. Base Oils (70–90%)

The main component that provides lubrication.
Base oils can be:

Mineral oil – refined from crude petroleum.

Synthetic oil – chemically engineered for higher performance (e.g. PAO, esters).

Semi-synthetic oil – a blend of mineral and synthetic oils.

Function:
→ Reduces friction, carries heat away, and forms a protective film on metal surfaces.

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⚗️ 2. Additives (10–30%)

Additives improve performance and protect the engine under various conditions.

Additive Type Purpose

Detergents Clean deposits and prevent sludge formation.
Dispersants Keep dirt and soot suspended to prevent buildup.
Anti-wear agents Protect moving parts (e.g. Zinc Dialkyldithiophosphate – ZDDP).
Antioxidants Prevent oil oxidation and thickening at high temperatures.
Viscosity Index Improvers Maintain viscosity across temperature changes.
Pour Point Depressants Improve flow at cold temperatures.
Corrosion & Rust Inhibitors Prevent metal corrosion.
Friction Modifiers Reduce friction for better fuel economy (e.g. molybdenum compounds).
Foam Inhibitors Reduce foaming in the oil during engine operation.
Dye/Coloring agents Used for identification or branding.

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⚙️ 3. Optional Additives (in premium oils)

Seal conditioners – keep seals soft and prevent leaks.

Detergent boosters – improve cleaning in high-mileage or turbocharged engines.

Metal deactivators – prevent catalytic reactions with copper and other metals.

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Example Composition (approximate)

Component Percentage

Base Oil 80%
Detergents + Dispersants 5%
Anti-wear Agents (ZDDP etc.) 2%
Antioxidants 2%
Viscosity Modifiers 7%
Others (foam inhibitors, rust inhibitors, etc.) 4%