5W40 Engine Oil

Master the ins and outs of 5W40 engine oil with MyCar.Repair's expert guide

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Do you want to get familiar with the best 5W40 engine oil for your vehicle? Are you looking for some details about 5W40 oil? If yes, then you have come to the rightmost website because we have covered all the necessary information about 5W40 oils in this article! For any questions and oil recommendations please contact our expert team and get some free advice.

What does 5W40 oil mean?

You might be familiar with the term that ‘W’ indicates in 5W40 oil. It means ‘Winter’. The number before the letter ‘W’ represents the viscosity of the motor oil at lower temperatures. On the other hand, the number succeeding the letter ‘W’ represents the oil viscosity at higher operating temperatures. A higher temperature is usually about 150 degrees Celsius, and it occurs when the car engine starts running.

What does 5W40 oil mean? It stands for the viscosity grade during cold and operating temperatures

Therefore, 5W40 fully synthetic oil has a winter viscosity of grade five. It is comparatively more viscous for the winter season than the other motor oils, such as 10W40. Moreover, 40 grade for the oil viscosity means that it is just stable and viscous at higher operating temperatures during hot engine moments like a traffic jam or in hot sport engines in general.

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Which cars and engines should use 5W40 oil?

5W40 fully synthetic oil is compatible with most vehicles. It is mostly used in cars that have either a hot sporty engine or a high mileage worn out engine with increased friction. Moreover, we recommend using this motor oil in the gas-powered engines with high engine heat (higher performance ones) of most European vehicles. It is also suitable for many American diesel pickup trucks and SUVs.

Which cars should use 5W40 oil? SUVs and Sport cars with hot engines as well as Diesel engines in cold climate zones.

Benefits of the 5W40 oils

5W40 fully synthetic engine oil can benefit your vehicle in different possible ways. Some of its benefits are:

  • Due to its 5W40 viscosity grade, the engines should start smoothly at lower temperatures. The thin oil in cold temperatures quickly reaches all points of the oil system during a cold start.

  • It refrains the deposits and sludge to occur on the engine parts because it has a high heat tolerance and avoids that oil gets burned.

  • It protects against engine wear and tears. Moreover, it also helps in maintaining its protective properties for a longer period.

  • It helps in making the engine durable and last longer as a whole as it protects quicker during a cold start than a 10W40. During a cold start most of the aging and friction takes place in the engine.

  • It assists in the reduction of fuel consumption as its a relatively thin oil.

  • It has considerable resistance to heat, so it works best during extreme conditions and harsh driving.

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Why are 5W40 oils often better for your car than 5W30?

5w3o is a common motor oil that works for most car engines that run at average optimal temperature. Moreover, it suits different temperature spectres and has high fuel efficiency. On the other hand, 5W40 fully synthetic engine oil is suitable for engines having higher performance or slightly older engines that used to run on 5W30.

5W40 oil can often be the better choice than 5W30 oil

Both of these engine oils have a similar viscosity grade for colder temperatures, but 5W40 engine oil outperforms 5W30 engine oil when it comes to operating at higher temperatures. It is due to the better viscosity grade for warmer operating temperatures.

What is the difference between 5W40 and 10W40?

The major difference between 5W40 engine oil and 10W40 oil is that the former oil is thinner than the latter one.

The choice between 5W40 and 10W40 depends upon the temperature of the area you live in. The 5W40 motor oil is better for colder starts because it smoothly flows throughout the engine in colder environments. The LIQUI MOLY Leichtlauf High Tech 5W40 engine oil has a Pour Point of -45C while the LIQUI MOLY Super Leichtlauf 10W40 has a Pour Point of -36C. 10 Degrees Celsius over the Pour Point is when the oil is too hard to operate during a cold start. The lower the pour point the faster the cold oil will always move across the oil system at the cold start.

What is the difference between 5W40 oils and other viscosities?

Both of these oils do not vary much when it comes to higher operating temperatures of the car engines which are more significant. So, using 10W40 engine oil does not make a huge difference on high mileage cars in a warm climate. It also lubricates the mobile engine parts very well. However, we recommend using this motor oil if you often drive in warm regions as it will be more effective there.

Best 5W40 engine oils

There is a large range of 5W40 fully synthetic engine oil available in the market today. You can order the best quality 5W40 engine oils at MyCar.Repair here and either bring this high quality lubricant to your favorite workshop or do the oil change on your own with the help of our DIY Tutorials and curated DIY oil change kits with the correct amount of 5W40 engine oil and the right OEM quality engine oil filter from Mahle. Find the the right DIY oil change kit for your car here or send us a message with your license plate here. Our expert team will get back to you quickly with a recommendation.

Best 5W40 engine oils have manufacturer approvals and guarantee long oil change intervals

In this article, we have listed some of our top picks for the best 5W40 engine oils according to their specifications. So, without any further ado, let’s get into the details of them!

LIQUI MOLY Leichtlauf High Tech 5W40

This fully synthetic formula deserves your attention being the best seller product out there. LIQUI MOLY Leichtlauf High-Tech 5W40 fully synthetic engine oil is a modern-class low-friction formula that works well for both gasoline engines as well as diesel engines.

LIQUI MOLY Leichtlauf High Tech 5W40 is a really good 5W40 engine oil with a strong additive package and many OEM approvals

It ensures the smooth running of the car engine with swift oil flow throughout. It reduces pollutant emissions and provides a high level of protection against engine wear.

The engine oil has a very high additive content with useful ingredients for older cars to soften the engine sealants, which will result in less evaporation, avoidance of costly sealant replacement and better engine compression.

So, if you are looking for a free delivery option of 5W40 engine oil, get your hands on this amazing LIQUI MOLY formula!

Order here https://mycar.repair/uk/product/liqui-moly-leichtlauf-high-tech-5w-40/ and get this premium 5W40 engine oil for your car.

Manufacturer Approvals

  • ACEA A3

  • ACEA B4

  • API SN

  • BMW Longlife-01

  • MB-Approval 229.5

  • Peugeot Citroen (PSA) B71 2296

  • Porsche A40

  • Renault RN 0700

  • Renault RN 0710

  • VW 502 00

  • VW 505 00

  • Chrysler MS-10725

  • Chrysler MS-10850

  • Fiat 9.55535-H2

  • Fiat 9.55535-M2

  • Fiat 9.55535-N2

  • Fiat 9.55535-Z2

  • Opel GM-LL-B-025

  • Peugeot Citroen (PSA) B71 2294

Mobil Super 3000 5W40

Mobil super 3000 5W40 engine oil is another bestseller option if you are looking for a budget-friendly as well as extremely efficient engine oil.

It works best for engine management and is recommended by most car manufacturing companies. Moreover, it offers splendid thermal and oxidative stability. In addition to that, it provides outstanding lubrication to the necessary moving parts, especially during cold starts.

So, wait no more and try out this affordable product right now!

Manufacturer Approvals

  • AVTOVAZ (LADA cars)

  • Porsche A40

  • Peugeot/Citroën Automobiles B71 2296

  • RENAULT RN0700

  • RENAULT RN0710

  • VW 502 00

  • VW 505 00

  • MB-Approval 229.3 

  • GM-LL-B-025

  • API CF

  • ACEA A3/B3

  • ACEA A3/B4

  • API SJ

  • API SL

  • API SM

  • API SN


  • JASO MA2

  • AAE (STO 003) Group B6

  • Fiat 9.55535-M2

Castrol Edge 5W40

This advanced fully synthetic formula from the brand Castrol is hands down the strongest 5W40 engine oil. It withstands higher temperatures and pressures in advanced turbo diesel engines as well as gas engines.

Moreover, it offers high performance and fuel efficiency. In addition to that, most world-leading car manufacturer companies recommend this product which protects at low temperatures.

So, if you are looking for the most powerful option of 5W40 oil, check out this product right now!

Manufacturer Approvals

  • ACEA A3/B3, A3/B4


  • BMW Longlife-01

  • MB-Approval 226.5/ 229.3/ 229.5

  • Porsche A40

  • Renault RN0700 / RN0710

  • VW 502 00/ 505 00

Castrol Magnatec 5W40

The Castrol Magantec 5W40 fully synthetic oil is another considerable option that provides a robust field of protection for the car engine.

The main feature of this engine oil is that it reduces the stop-start wear as well as the warm-up wear by 50 per cent.

Therefore, you must check out this advanced technology for engine and other car parts protection!

Manufacturer Approvals

  • ACEA C3


  • BMW Longlife-04

  • Dexos 2*

  • Meets Fiat 9.55535-S2

  • MB-Approval 229.31

  • Renault RN 0700 / RN 0710

  • VW 502 00/ 505 00

Shell Helix Ultra 5W40

Shell Helix Ultra 5W40 is a fully synthetic motor oil designed for high performance.

It is formulated using the unique Shell PurePlus Technology that keeps the engine clean. It is approved by many quality performance vehicles.

Go try this out for higher performance as well as protection!

Manufacturer Approvals


  • ACEA A3/B3, A3/B4

  • BMW LL-01

  • MB Approval 229.5, 226.5

  • VW 502.00/505.00

  • Porsche A40

  • RN 0700, 0710

  • PSA B71 2296


  • Fiat 9.55535.Z2

  • Chrysler MS-10725

Total 5W40

Total 5W40 is a fully synthetic motor oil for car engines. It is operational on different technologies like a multi-valve, direct injection, and turbocharger.

Having an advanced detergent formulation, the engine components remain clean. It can deliver excellent performance even at cold temperatures.

So, check it out right now!

Manufacturer Approvals

  • ACEA A3/B4



  • VOLKSWAGEN: 502.00/505.00

  • BMW: LL01

  • MERCEDEZ BENZ: MB Approval 229. 5

  • PORSCHE: A40

  • Meets the requirements of Chrysler MS-12991

  • Meets the requirements of FIAT 9.55535-M2

Petronas Synthium 3000

Petronas Synthium 3000 has been formulated with CoolTech so that it can reduce the excessive heat of the engine. The CoolTech can target the critical heat zones that are affected by excessive engine heat.

Moreover, it can deliver protection against low-speed pre-ignition. It is a hi-tech lubricant that can satisfy the demands of the new engines.

Check out this marvellous engine oil right now!

Manufacturer Approvals

  • Meets or exceeds the requirements of API SN

  • ACEA C3

  • GM Dexos 2

  • Ford WSS-M2C917-A

  • Approvals of MB-Approval 229.51

  • BMW Longlife-04

  • VW 502 00 / 505 00 / 505 01

  • Porsche A40

  • Renault RN0700 / RN0710

Valvoline 5W40

Valvoline 5W40 is high-quality synthetic motor oil. It is formulated to provide effective performance.

Moreover, it can work for a broad range of engines. It is best suitable for turbocharged diesel engines of light trucks and passenger cars.

So, try out Valvoline 5W40 engine oil for an amazing performance!

Manufacturer Approvals

  • SAE 5W-40


  • ACEA A3/B4

  • Meets requirements of:

  • MB 229.3

  • GM-LL-B-025

  • VW 502.00/ 505.00

  • Renault RN710, RN700

Millers Nano drive 5W40

Millers Nano drive 5W40 is a fully synthetic engine oil for diesel and petrol engines. The oil is formulated with synthetic base fluids including three esters combined. To ensure maximum performance it works with the latest additive technology.

Moreover, it hugely reduces the wear and decreases friction by 26%. It has high film strength that can protect with great cold flow properties.

So, get your hands on this engine oil as soon as possible!

Motul 300v Power 5W40

Motul 300v Power 5W40 is synthetic engine oil that can work for all racing diesel and gasoline engines. In addition to that, the oil work efficiently for engines that are operational over a wide range of temperature and rpm.

We highly recommend buying this cost-effective product!

Fuchs Titan 5W40

Fuchs Titan 5W40 is a high-performance fully synthetic engine oil that has multi-purposes in cars providing engine cleanliness and high thermal stability.

Moreover, it provides improved oil pressure and wears protection for all the engines.

So, do not waste time and buy this super amazing formula right now! 

Manufacturer Approvals

  • ACEA A3/B4



  • MB-APPROVAL 229.3


  • PSA B71 2296

  • RENAULT RN0700/RN0710

  • VW 502.00/505.00



  • FIAT 9.55535-H2/M2/N2/Z2 

FAQs on 5W40 engine oil

Q. Should we use 5W30 or 5W40 for turbo diesel engines?

You should use 5W40 engine oil for turbo diesel engines.

Q. What is 5W40 oil used for?

It is used for starting your car engine at lower temperatures and to protect against wear.

Q. Which is the best 5W40 engine oil?

LIQUI MOLY Leichtlauf High Tech is the best seller 5W40 engine oil.

Best 5W40 engine oil? We recommend LIQUI MOLY Leichtlauf High Tech 5W40 due to its strong additive package and high TBN

Q. For how many kilometers can 5W40 last?

15,000 to 25,000 kilometres.

Q. Can I use 5W40 instead of 5W30?

Yes, you can.

Q. Should I use 5W30 or 5W40 for summer?

Both work best for colder environments, however, 5W40 works better than 5W30 for summer.

Q. Does 5W40 run hotter than 5W30?

No, 5W30 will cause more friction and run hotter.

Q. Which oil is best for hot weather?

5W40 engine oil.

5W40 is ideal in hot climate when engines heat up quickly

Q. Which is compatible with high mileage engines 5W30 or 5W40?

5W40 works best for high mileage engines.

Q. Are all 5W40 oils the same?

Yes, each of them has almost the same properties in terms of viscosity but they differ with their additive packages and OEM approvals.

Q. What will be the effect on oil pressure if I use 5W40 oil rather than 5W30?

There will be an increase in oil pressure if you use 5W40 instead of 5W30 engine oil.

Final Word

If you want to find the right oil for your vehicle, enter the vehicle details to any automotive or car repair website. However, we recommend using the LIQUI MOLY formula as it is the best seller product available in the market right now!

Read Enough? Let's get started!

Let us help you with your next car service. Start browsing our amazing shop or speak to one of your experts now about your needs.