The Best Engine Oil 2021

Choosing the correct engine oil for your car is more important than ever due to the complexities of modern engines. Most brands offer several different blends but it’s crucial that you use an oil that meets the requirements of your car.

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Best Engine Oil UK
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If you require a quick answer, the best engine oil is the Castrol Edge 5W-30, which is a full synthetic oil that’s designed for maximum performance. However, if want a top rated budget oil, you can’t go wrong with the Comma XTech formula.

After many years of changing the oil on cars and using a range of formulas, we have plenty of experience to choose between the hundreds that are available. Our recommendations in this article are based upon the oil’s specification, additional qualities that make them unique and value for money. If this is the first time you are changing your car’s oil yourself, we have wrote an in-depth guide on how to change the oil in your car that walks you through each step.

Engine Oil Comparison

Engine OilViscosityBottle Size(s)
Castrol Edge5W-301 & 5 Litres
Mobil 1 ESP5W-301 & 5 Litres
Castrol Magnatec10W-401, 4 or 5 litres
Mobil Super 30005W-301 & 5 Litres
Comma XTech5W-305 Litres
Triple QX SynPlus5W-401, 2.5 and 5 litres

Keeping to the servicing schedule of your car and using the correct oil is crucial to maintaining a smooth running engine. Neglecting regular oil changes can result in costly repair bills that could have easily been avoided.

Below is a list of the best engine oils that are available in several different blends and viscosity grades.

The Best Engine Oil


1. Castrol Edge 5W-30 Full Synthetic Oil

Castrol Edge 5W-30 Full Synthetic Oil
Castrol is one of the most well-know brands in the engine oil industry and they produce a wide range of oils. The Edge formula is their most popular option that offers improved wear protection and maximum engine performance.

For drivers of performance based cars, this engine oil is probably the recommendation within your owners manual. It’s boosted with Titanium FST, which is proven to provide extra oil strength for engines that work at higher pressures.

Other features of the Castrol Edge Oil include:

  • SAE 5W-30
  • Manufactured in the EU
  • Approved for use in OEM vehicles
  • Performance oil of choice for cars requiring 504.00 specification
  • Suitable for petrol or diesel engines
  • Micro-filtered and certified CO2 neutral
  • Available in 1 or 5 litre bottles

The Castrol Edge 5W-30 is the best engine oil for performance cars and the recommended option for most Audi, Volkswagen, Porsche, Mercedes, Skoda, Seat and other petrol engines. The main drawback is that it does come with a premium price tag but if you want the best for your engine, it’s the ultimate choice.
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2. Mobil 1 ESP Synthetic Engine Oil

Mobil 1 ESP Synthetic Engine Oil
Monil 1 is another highly reputable engine oil brand in the UK and their ESP 5W-30 is one their most rated oils. It’s very popular among diesel drivers as it assist with cleaning the DPF by reducing particulate build-up inside of the filters.

Another standout feature of this engine oil is the cold weather performance, which many other oils lack. According to the brand, the oil provides quick starting and ultra fast protection even in extreme cold temperatures.

Other features of the Mobil 1 ESP include:

  • SAE 5W-30 oil
  • Excellent low temperature capabilities
  • Prevents the build-up of deposits and sludge
  • Reduces oil aging
  • Suitable for petrol or diesel vehicles
  • Available in a 1 or 5 litre bottle

Although it’s one of the most expensive oils on the market, it’s proven to be one of the best and used by premium manufacturers such as Porsche and Bentley. Unlike many of the alternatives, the ESP formula not only improves the performance but also provides additional cleaning power for older or high mileage vehicles.
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3. Castrol Magnatec 10W-40 Semi Synthetic Oil

Castrol Magnatec 10W-40 Semi Synthetic Oil
Another engine oil by the Castrol brand that’s just as popular is the Magnatec formula, which is designed for engine protection. The brand state that the oil clings to your engine and forms an extra layer, which acts as a protective layer during start up and for all driving conditions.

The main difference between Castrol Edge and Magnatec is the additives that’s used in the engine oil. The Edge formula uses titanium FST, which provides additional oil strength under pressure and is best for performance cars. Whereas the Magnatec formula uses a different blend with the intention to cling onto the engine for additional protection.

Other features of the Castrol Magnatec Oil include:

  • 10W-40 semi synthetic oil
  • Added protection in high and low temperatures
  • Unique patented stop-start protection
  • Suitable for both petrol and diesel engines
  • Available in 1, 4 or 5 litre bottles

For those that require a protective oil that’s designed to prolong the life of the engine, the Castrol Magnatec is perfect. It’s compatible with most engines and ticks all the boxes in terms of protection in both low and high temperatures.
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4. Mobil Super 3000 Full Synthetic Motor Oil

Mobil Super 3000 Full Synthetic Motor Oil
The Mobil Super 3000 is another full synthetic engine oil by the brand that provides enhanced performance and protection. It’s suitable for a range of petrol or diesel engines of any age and according to the brand, it will noticeably reduce engine noise.

Other features of the Mobil Super 3000 include:

  • SAE 5W-30
  • Fully synthetic motor oil
  • Suitable for many vehicle types and ages
  • Improved fuel economy (as per ACEA A5/B5)
  • Available in 1 or 5 litre bottles
  • 5 year expiry date from manufactured date

Considering that it’s a Mobil 1 full synthetic oil, the Super 3000 formula offers great value for the money. It’s an excellent all-round engine oil that improves engine cleanliness and promotes maximum performance.
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5. Comma XTC5L XTech Fully Synthetic Oil

Comma XTC5L XTech Fully Synthetic Oil
For those on a tight budget and require an oil that provides excellent performance, the Comma XTech is the best option. It’s a full synthetic blend that’s made in the UK and is suitable for petrol and diesel powered vehicles.

According to the brand, their synthetic engine oil has been designed to provide maximum performance as well as noticeably improved fuel economy.

Other features of the Comma XTech include:

  • SAE 5W-30
  • Fully synthetic blend
  • Manufactured in the UK
  • Expiry date of 5 years
  • 5 litre bottle size

The Comma XTech is one of the most highly rated budget engine oils on the market that offers great value for the money. The fact that it’s fully synthetic and made in the UK but still one of the cheapest is highly impressive.
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6. Triple QX SynPlus Car Engine Oil

Triple QX SynPlus Car Engine Oil
Another cheap engine oil option is the Triple QX SynPlus formula, which is highly rated and available in a large 5 litre bottle. It’s also a 5W-40 viscosity oil that’s suitable for a wide range of vehicles in the UK.

Other features of the Triple QX SynPlus include:

  • SAE 5W-40 full synthetic
  • Advance additive technology
  • Wide compatibility with a range of vehicles
  • Blended in the UK
  • Available in 1, 2.5 and 5 litre bottles

The Triple QX SynPlus is a cheap synthetic oil that’s a fraction of the price when compared to oil from the much larger brands. It ticks all the boxes that you would expect from an affordable engine oil and it won’t disappoint.
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How We Rated The Engine Oil

After many years of changing the oil on cars that range from an Audi RS6 to budget daily cars, we have used and tested a number of formulas. We also have the knowledge to base our recommendations in this article upon their specification, additional qualities and value for the money. Below are some of the engine oils we’ve used along with action shots of oil changes posted on our Instagram page.

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Conclusion

Maintaining your car with the correct oil isn’t something you should ignore as it can lead to expensive repairs later down the line. There are hundreds of different oils available but you should always double check the owners manual to find the correct specification for your car. Many brands will also offer a “car checker” in case you cannot find your documents.

All of our recommendations are suitable for every budget and can be used in the majority of UK vehicles. Rather than letting a garage change the oil, doing it yourself with one of the recommendations above can save you a lot of money. You will also have peace of mind that the oil you have purchased is the one being used in the oil change.

author dan 4car

Written By Dan

Dan has been a car enthusiast ever since he can remember and has an extensive range of cars that include classic cars that he has restored himself from a barn find condition to modern performance cars. Whether you need advice on how to install car parts or recommendations on what products to buy, Dan’s first-hand experience will certainly help.

If you want to find out more about Dan, our testing process or the website itself, visit our about page for further information.

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