Engine Oil and Motor Oil

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Motor oil – protect all parts of your engine

Engine oil is one of the most basic car maintenance items. Since it’s designed to prevent the moving parts of an engine from stiffening by lubricating them as needed, motor oil must be just as reliable at freezing temperatures as it is with the extreme heat of a running engine. Aside from reducing friction, motor oil also cools and insulates the components that the cooler fluid can't reach. There are several types of motor oils: mineral motor oils, made from petroleum distillates, synthetic engine oils, and semi-synthetic motor oils, which are a mixture of both synthetic and mineral-based oils. Oils designed for two-stroke engines shouldn't be used in four-stroke engines, but synthetic and mineral oils can be mixed as long as they have the same performance grade.

Trust the team at mytyres.co.uk to find your perfect motor oil. From Castrol to Mobil, we offer a large selection of performance engine oil. Use our products to extend the service life of your vehicle. You can search our site for free or contact us for questions about our engine oil products and fluids. We are also happy to help you by phone. View the detailed engine oil product description for these top-selling Castrol and Mobil motor oils to learn more. You can also refer to the handbook of your vehicle to find out which product to use. Each car manufacturer will make a recommendation for the right synthetic engine oil to protect all of your engine parts. For more help, you can also use our handy search feature or view the product reviews on our site. Free delivery is available on all qualifying orders – including synthetic performance oil fluids. We strive to bring you high-quality engine oil products!

Motor oil designations

One question is unavoidable when buying engine oil: all those names and numbers - Castrol, Mobil, 5W-40, 0W-40 - what do they mean? The brand name can have an impact, but what is most important when looking for engine oil is the oil viscosity. Most of the time, it's enough to take a look at the manufacturer's recommendations to find the SAE viscosity class as well as any API classification and ACEA specification needed for a car. These should be respected because not doing so can void the warranty of a car.

Viscosity refers to the internal friction of the fluid. SAE stands for Society of Automotive Engineers and signifies the motor oil grade while differentiating between summer and winter oils (also known as single-grade oils). Most drivers prefer multi-grade oils, which are suitable for all seasons - for example, an SAE 10W-40 oil. The number in front of the “W” (which is short for 'winter,' meaning that the oil can be used in winter) stands for the motor oil's minimum viscosity. The number following the “W” indicates the maximum temperature at which the oil can be pumped.

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