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What is motor oil and why is it important?Motor oil is a lubricant designed to protect your engine by reducing friction, removing heat, and preventing wear. Without proper motor oil, engine parts grind together and can cause severe, expensive damage. It also keeps the engine clean by trapping dirt and debris. Compared to other fluids, motor oil plays the single most important role in engine longevity.
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Is motor oil the same as engine oil?Yes ! motor oil and engine oil mean the same thing. Both terms refer to the lubricant used inside your vehicle's engine. Some people prefer “engine oil,” while others use “motor oil,” but they are identical in purpose and function.
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What is the difference between 5w30 and 5w40 motor oil?Both 5w30 and 5w40 motor oil flow similarly in cold temperatures (“5w”), but at high temperatures:
5w30 remains thinner
5w40 stays thicker and provides more protection at high heat
Drivers in hotter climates or demanding conditions often choose 5w40, while 5w30 is generally preferred for daily driving and fuel efficiency. -
Is 10w40 better than 5w30 or 5w40?Not necessarily. The best choice depends on your engine:
10w40 motor oil is thicker at cold start and high heat
It’s suitable for older engines, high-mileage vehicles, or engines with slight oil burning
Modern cars typically perform better with 5w30 or 5w40
Always check your owner’s manual before switching. -
How often should I change my motor oil?Most vehicles require motor oil changes every:
5,000–7,500 km for synthetic blends
10,000–15,000 km for full synthetic motor oil
However, driving habits, climate, and engine design can affect this interval. -
What happens if I use the wrong motor oil grade?Using the wrong motor oil (for example choosing 10w40 instead of 5w30) can cause:
Reduced fuel efficiency
Poor cold starts
Increased engine wear
Potential long-term engine damage
Always match your engine oil grade to the vehicle’s specifications. -
Which motor oil is best for high-mileage cars?For engines with over 100,000 km:
10w40 is often recommended because it’s thicker
It can reduce oil burning and improve lubrication -
Can synthetic motor oil damage older engines?No! this is a myth. Modern synthetic motor oil is safe for both new and old engines. It provides better protection, cleanliness, and performance than conventional oils. Just ensure the oil grade (5w30, 5w40, 10w40) matches your vehicle requirements.
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How do I know if my motor oil needs to be changed?Common signs include:
Dark, dirty oil on the dipstick
Engine knocking or ticking sounds
Dashboard oil light
Burning oil smell
Poor engine performance
Checking your motor oil regularly prevents serious issues.

