Diesel Engine Oil Guide: How to Choose the Best Oil for Your Engine

Diesel engine oil prices in Pakistan, which vary depending on the grade of the oil and range from Rs800/liter to Rs29000/liter.

Refer to the table below for the specific diesel engine oil price in Pakistan for each brand.

Engine Oil BrandPrice Range
ShellRS 2,450 – RS 9,650
AmsoilRS 4,225 – RS 16,900
KixRS 7,450 – RS 9,850
HavolineRS 2,170 – RS 8,680
CastrolRS 5,000 – RS 8,100

How to Choose the Best Engine Oil for Your Car

Engine oil is essential for your car’s performance and longevity. It performs many functions, such as lubricating, cooling, sealing, cleaning, and protecting the engine. But how do you know which engine oil is right for your car? Here are some tips to guide you.

  • Consult your owner’s manual: The first and most important step is to check your car’s manual for the recommended type, viscosity (e.g., 5W-30), and brand of engine oil. This will ensure that you use the oil that is designed for your car’s engine and meets its specifications.
  • Consider the weather conditions: The viscosity of engine oil changes with temperature. You need to choose the right viscosity grade (the numbers on the oil bottle) for the climate you live in. For example, if you live in a cold area, you need a lower viscosity oil that can flow easily in low temperatures. If you live in a hot area, you need a higher viscosity oil that can withstand high temperatures and prevent thinning.
  • Think about your car’s mileage: If your car has a lot of miles on it (usually more than 75,000 miles), you may want to use high-mileage oil. This type of oil has special additives that help restore worn seals and gaskets, reduce oil consumption, and prevent leaks.
  • Look for API and ACEA ratings: These ratings indicate the quality and performance of engine oil. They are displayed on the oil container with symbols or letters. API (American Petroleum Institute) ratings are for engine oils used in cars and motorcycles. ACEA (European Automobile Manufacturers Association) ratings are for engine oils used in European vehicles. You should look for the ratings that match your car’s requirements and standards.
  • Avoid cheap and unknown brands: You may be tempted to save money by buying generic or low-quality engine oil, but this can be a costly mistake. Cheap and unknown brands may not meet the industry standards and may damage your engine in the long run. You should stick to well-known and trusted engine oil brands that have proven their quality and reliability.

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The Different Types of Engine Oil Explained

There are four main types of engine oil: conventional, synthetic, semi-synthetic, and high-mileage. Each type has its advantages and disadvantages, depending on your car’s needs and preferences.

  • Conventional oil: This is the most basic and common type of engine oil. It is made from crude oil and is suitable for many older and less demanding engines. However, it may not provide enough protection and lubrication in extreme conditions and may require more frequent changes.
  • Synthetic oil: This is the most advanced and expensive type of engine oil. It is chemically engineered to provide superior performance and protection. It can handle high-stress situations and harsh temperatures better than conventional oil. It can also improve fuel efficiency and engine lifespan. However, it may not be compatible with some older engines and may require special filters.
  • Semi-synthetic oil: This is a type of oil that combines synthetic and conventional oils. It offers some of the benefits of synthetic oil while being more affordable. It can work with a variety of engines and provide better protection and lubrication than conventional oil. However, it may not be as effective as synthetic oil in extreme conditions and may still need regular changes.
  • High-mileage oil: This is a type of oil that is designed for vehicles with high mileage (usually over 75,000 miles). It has special additives that help repair damaged seals and gaskets, reduce oil consumption, and prevent leaks. It can extend the life of your engine and improve its performance. However, it may not be necessary for newer or well-maintained engines and may cost more than conventional oil.

Why Viscosity Matters in Engine Oil

Viscosity is a measure of how thick or thin a fluid is, and how easily it flows. Engine oil viscosity is important because it affects how the oil moves and lubricates inside the engine, especially at different temperatures. Too thick or too thin oil can cause problems for your engine and reduce its efficiency.

Engine oil viscosity is expressed by two numbers, such as 5W-30. The first number (with the W for winter) indicates the oil’s viscosity at low temperatures. The lower the number, the thinner the oil and the easier it flows in cold weather. The second number indicates the oil’s viscosity at high temperatures. The higher the number, the thicker the oil and the more it resists thinning in hot weather.

You should choose the right viscosity grade for your engine and your climate. If you use oil that is too thick for your engine or your weather, it may not flow properly and may cause increased friction and wear. If you use oil that is too thin for your engine or your weather, it may not provide enough lubrication and protection and may cause increased heat and leakage.

What are API, ACEA, and JASO in Engine Oil?

API, ACEA, and JASO are organizations that set standards and specifications for engine oil quality and performance. These standards help consumers and technicians choose the right engine oil for their vehicles. They are usually displayed on the oil container with symbols or letters.

  • API (American Petroleum Institute): API sets standards for engine oils used in cars and motorcycles. It uses two categories: S for gasoline engines and C for diesel engines. Each category has subcategories that indicate the level of performance and protection. For example, API SN is the latest and highest standard for gasoline engines, while API CK-4 is the latest and highest standard for diesel engines.
  • ACEA (European Automobile Manufacturers Association): ACEA sets standards for engine oils used in European vehicles. It uses three categories: A for gasoline engines, B for diesel engines, and C for engines with exhaust after-treatment devices. Each category has subcategories that indicate the level of performance and protection. For example, ACEA A5/B5 is a standard for fuel-efficient oils for gasoline and diesel engines, while ACEA C3 is a standard for low-ash oils for engines with particulate filters.
  • JASO (Japanese Automotive Standards Organization): JASO sets standards for engine oils used in motorcycles. It uses two categories: MA for wet-clutch engines and MB for dry-clutch engines. Each category has subcategories that indicate the level of performance and protection. For example, JASO MA2 is a standard for high-performance oils for wet-clutch engines, while JASO MB is a standard for low-friction oils for dry-clutch engines.

Conclusion

Choosing the best engine oil for your car is not a difficult task if you follow some simple steps. You need to check your owner’s manual, consider the weather conditions, think about your car’s mileage, look for API and ACEA ratings, and avoid cheap and unknown brands. You also need to understand the different types of engine oil, such as conventional, synthetic, semi-synthetic, and high-mileage, and their advantages and disadvantages. Moreover, you need to know the importance of viscosity in engine oil and how it affects your engine’s performance and protection. Finally, you need to be aware of the standards and specifications set by API, ACEA, and JASO for engine oil quality and performance. By following these tips, you can choose the best engine oil for your car and enjoy a smooth and safe ride.

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