Engine oil plays a critical role in protecting the engine, reducing friction, and improving fuel efficiency. Choosing the right oil and changing it at the right time helps extend engine life and prevents costly repairs.
Recommended Oil Change Intervals
- 5,000 – 7,500 km for conventional mineral oils.
- 7,500 – 10,000 km for semi-synthetic oils.
- 10,000 – 15,000 km for full synthetic oils.
- Shorter intervals if driving in hot climates, stop-and-go traffic, or towing heavy loads.
Signs That Indicate an Oil Change
- Oil turns dark and thick in texture.
- Strange engine noises or knocking sounds.
- Oil pressure warning light on the dashboard.
- Low oil levels when checked with the dipstick.
- Burning oil smell while driving.
Comparison of Oil Types
| Type |
Average Lifespan |
Performance |
Price |
| Conventional Oil |
5,000 – 7,500 km |
Basic protection |
Low |
| Semi-Synthetic Oil |
7,500 – 10,000 km |
Balanced performance |
Medium |
| Full Synthetic Oil |
10,000 – 15,000 km |
High performance |
High |
Recommended Oils for Gasoline vs Diesel Engines
| Engine Type |
Recommended Oil Grade |
Notes |
| Gasoline |
5W-30, 10W-30 |
Best for daily driving, fuel economy, and cold starts. |
| Diesel |
5W-40, 15W-40 |
Thicker oil designed to handle high compression and heavy loads. |
Global Statistics
- 35% of engine breakdowns are caused by delayed oil changes or poor-quality oil.
- Vehicles that follow recommended oil changes experience up to 5% better fuel economy.
- The global engine oil market is valued at over $40 billion annually and is expected to grow steadily.
- More than 60% of drivers worldwide admit to skipping at least one recommended oil change interval.
Extra Tips for Better Maintenance
- Always replace the oil filter when changing oil.
- Check oil levels every two weeks to prevent low lubrication.
- Use only oils approved by the manufacturer (API, ACEA, or OEM standards).
- For older cars, high-mileage oils can reduce leaks and oil burn.
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