Castrol Engine Oil

Have you already made a choice in favour of the Castrol Oil? In this article we’ve chosen the most popular Castrol oils for you and looked at how to choose the right oil for your car.

The most popular Castrol motor oils are 0W-20, 5W-20 and 5W-30 viscosity oils with API specifications: SM, SN, SP. Such Castrol oil is suitable for most engines of modern cars of the inhabitants of the USA. We have made our list of the 5 most popular Castrol oils.

Castrol engine oil provides lubrication to all moving internal engine parts, covering them with a protective film, protecting engine parts from dirt, harmful deposits, and from corrosion. We’ve created this Castrol oil guide to help you choose the right engine oil for your vehicle.

How to choose Castrol engine oil:

In order to choose the right engine oil for your car, you need to study the manual of your car and find in it the requirements for the applied engine oil.Pay attention to the viscosity, specifications and tolerances of car manufacturers.

For each engine oil in this article we have indicated the specifications and tolerances of car manufacturers, thanks to which it will be very easy to choose an oil for your car.

If information on tolerances or specifications is not available to you for some reason, select the oil selection menu by car make and model. We have selected the best motor oils for all popular cars.

Castrol engine oil types:

There are three main types of motor oil: mineral, semi-synthetic, and fully synthetic oils.

• Mineral oil is the least refined type of motor oil, which provides the least engine protection, is less productive, and less economical.
• This means that such oils cost much less than other types of oil.
• Semi-synthetic oils are a mixture of synthetic and mineral oils that provide more performance than mineral oils, but cost much less than synthetic oils.
• Fully synthetic oil is the most refined type of oil and at the same time the most expensive type of motor oil. Synthetic motor oils provide maximum protection and economy for a car’s engine.

Engine oil viscosity:

The viscosity grade of an engine oil is determined by the requirements of the international SAE standard. For each type of engine, you must use oil with the optimum viscosity, which depends on the design and age of the engine, its mode of operation and ambient temperature.

1. The first number before the letter “W” indicates the oil’s viscosity at low temperatures. The lower the number, the more fluid the oil is and the better it flows at low starting temperatures.
2. The second number refers to the flowability of the oil at high temperatures. This oil is thicker and better suited to protect the engine at high temperatures.

Engine designs are designed for medium and low viscosity oils. For new engine types, 0W-20, 0W-30 and 0W-40 oils are recommended. As the engine ages, the choice of oil shifts toward a higher viscosity. The most popular oil types are 5W-30 and 5W-40. For worn engines, 10W-40 and 15W-40 oils are used, depending on weather conditions and operating conditions.

• Low viscosity oils: 0W-20, 0W-30, 5W-20, 5W-30 are optimal for new engines with minimal clearances in the friction pairs.
• Medium viscosity oils: SAE 0W-40, 5W-40, 10W-40 are used for conventional engines, depending on the temperature conditions.
• High viscosity oils: 5W-50, 10W-50, 10W-60, 15W-50 are recommended for heavy duty engines.

Engine oil standards:

• The American API standards provide for two groups of classes for vehicles: S for gasoline engines, C for diesel engines (API: SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM, SN, SN Plus, SA, CB, CC, CD, CD, CE, CF, CF-4, CF-2, CG-4, CH-4, CI-4, CI-4 Plus, CJ-4).
• The European ACEA standard uses four groups: A for gasoline engines, B for diesel engines, C for engines with catalytic converters, and E for heavy diesel engines. ACEA: A1, A2, A3, A5, B1, B2, B3, B4, B5, C1, C2, C3, E1, E2, E3, E4, E5, E6, E7.
• Asian ILSAC standard: GF-1, GF-2, GF-3, GF-4, GF-5, IGF-6 define quality standards of oil for gasoline engines of passenger cars.