WHY USE SYNTHETIC OIL | WELCOME

Even if your manual doesn't insist on full synthetic engine oil, it's still a smart choice, as synthetic engine oils offer the best possible protection for all engines.

We can now virtually visit your site, vessel or factory without the travel.

Wherever you’re based in the world, whatever your industry, when you have a challenge or simply need some technical advice, our Castrol experts want to help.

Through our new digital solution, Castrol Virtual Engineer, we can now virtually visit your site, vessel or factory at any time, from anywhere in the world, without the travel.

Synthetic vs Conventional engine oil

To view this content, go to the cookie preferences page, linked in the footer, and switch on advertising and campaign cookies.

'This video has been optimised for iOS 14 and above. For the best experience, please update your software.'

Why should you choose full synthetic engine oil?

Most modern cars will already use a full synthetic engine oil, however older cars can still benefit from using a full synthetic oil.*

Full synthetic oils offer your engine the best possible performance and delivering optimum protection from the moment you start the engine. They work harder in all scenarios that put stress on an engine, such as driving in extreme temperatures, towing heavy loads and sitting in stop-start traffic.

Depending on the viscosity your manual recommends, synthetic oil can also improve the performance and fuel economy of your vehicle, and will even stay stronger for longer between drain intervals than traditional mineral or part synthetic oils.

*For cars older than 1995 please contact our Technical Support who will be happy to advise you.

Related links

How often should you check your engine oil

Your engine doesn't simply need the right specification of engine oil, it also needs to have the right amount at all times. So don't wait for a dashboard warning light before you pop the hood; it's a good idea to check your engine oil at the dipstick at least once a week, and always before a road trip.

How to check your engine oil

Running with a low oil level is incredibly bad for your engine, so it's important to check your engine oil regularly. Don't rely on dashboard warning lights alone; checking engine oil at the dipstick is a simple but important car maintenance task that absolutely everyone can do at home.

How to top up your car engine oil

Most cars use a little engine oil over time so it is essential to maintain the right level of engine oil by topping up with the right oil whenever your dipstick check says your oil level is low.

How to recycle your used engine oil

While oil is a natural resource, it occurs deep in the ground where it can't damage plant and animal life. It's vitally important that any used engine oil from home car maintenance makes it to a recycling centre, as this ensures that it won't leak into the ground, potentially causing hazards to wildlife and water resources.