Engine oil is typically made up of different base oils and additives blended together to deliver specific benefits for different parts of the engine.
It helps protect your engine from heat by filling the microscopic gaps between metal surfaces, and prevents corrosion by acting as a protective film over those surfaces. Oil also prevents wear on moving parts by adding a layer of protection against friction as they move over each other.
How to choose the best oil for your car's engine
Choosing the best oil is not just about picking up any bottle and pouring it in. You need to know what type of oil suits your engine, so you get the most out of every drop. Every engine requires a specific type of oil.
The right choice depends on the condition of your engine and the type of driving you do. A few factors to take into account:
- Temperature: which oil suits cold or hot conditions?
- Age: how long will this oil last?
- Weight: what viscosity is this oil?
- Price: what does this oil cost?
- Quality: what are the ingredients and quality-control standards?
The best engine oil protects your engine from wear, corrosion and damage. It should have the right viscosity and low volatility so it doesn't evaporate in hot weather, and strong protection against rust and oxidation.
Which type of engine oil should you use?
The key is knowing what type of engine you have and what kind of driving you do. The best oil for a car driven daily on the motorway may not be the best option for a car driven occasionally or in stop-and-go traffic.
There are three main types of oil for cars: conventional, synthetic and synthetic blend. Conventional oil is the most common, as it is cheaper and easier to find. Synthetic oils are engineered for higher performance, while synthetic blends combine conventional and synthetic base oils.
Synthetic oils offer better protection against corrosion, reduced engine wear, better fuel economy (including in cold weather), lower engine noise and lower emissions.
Key takeaway
Use an oil with a high viscosity index and the performance rating your manufacturer specifies. A high-quality oil with anti-wear and anti-oxidant protection and a low pour point will help your car last longer without problems.
