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Sigma Gold

Sigma Gold is suitable for your daily transportation car because of its applications.

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Keep your engine performing at its best with Sigma Oil

Talk to Product Team: +88-01700-760430

FAQs about car engine oil

It is suitable for many petrol and diesel passenger vehicles. Always check the vehicle manufacturer’s oil specification before use.

Yes, in most cases it works well. Older cars mainly need the correct oil grade, nothing fancy. When the grade matches the engine requirement, the oil supports smoother running and helps reduce rough engine noise over time.

Yes. The oil is made to handle heat, stop-and-go traffic & long idle times. These conditions are common on Bangladeshi roads, especially in cities, and the formulation remains reliable throughout the day.

Yes, heat makes a real difference. Poor-quality oil becomes thin very quickly in high temperatures. Once that happens, engine protection drops.

Most cars need an oil change every 5,000 to 7,000 kilometers. If you drive mainly in city traffic or take short trips, you may need to change it earlier. Traffic and heat reduce oil life faster than people expect.

Indirectly, yes. When the engine runs smoothly with proper lubrication, it wastes less energy. Poor oil increases friction & that can slowly affect fuel efficiency over time.

Synthetic oil generally handles high temperatures better and remains effective for longer intervals. Mineral oil can still be suitable for older engines or vehicles used mainly for short trips.

Delaying oil changes can cause silent damage. Old oil loses its ability to protect engine parts and may carry dirt and sludge. Over time, this leads to wear, noise, and reduced engine life.

Dark color alone is not enough. If the engine feels rough, sounds louder, or the oil level drops quickly, it may be time. Checking the mileage and service schedule is the safest method.

It is not recommended. A dirty oil filter contaminates fresh oil quickly. Changing both together keeps the engine cleaner and improves oil performance.