It is important to have the well suited 5w40 synthetic engine oil. Let’s take you step by step, type by type, and find the best 5w40 synthetic engine oil for you.

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Our Top Picks:

Best Overall: Buy: Shell Rotella 5W40 Synthetic Engine Oil READ REVIEW

Best For High Performance: Buy: Pennzoil 5W40 Synthetic Engine Oil READ REVIEW

Best For Long Oil Life: Buy: Valvoline 5W40 Synthetic Engine Oil READ REVIEW

Best With Amazing Price: Buy: Castrol 5W40 Synthetic Engine Oil READ REVIEW

Best For Synthetic Oils: Buy: Schaeffer Manufacturing Co 5W40 Synthetic Engine Oil READ REVIEW

Best For Car: Buy: Mercedes Benz 5W40 Synthetic Engine Oil READ REVIEW

Best For Hemi: Buy: Motul 5W40 Synthetic Engine Oil READ REVIEW

Best For Outstanding Protection: Buy: Mobil 1 5W40 Synthetic Engine Oil READ REVIEW

Best For Cheap Price: Buy: Mobil 5W40 Synthetic Engine Oil READ REVIEW

Best Overall: Shell Rotella 5W40 Synthetic Engine Oil

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Shell rotella 5w40 synthetic engine oil is the epitome of what a great oil should be. The Shell Rotella 5W40 Synthetic Engine Oil comes with its wide range of specifications and approvals from many of the world's leading engine makers, It is an excellent choice for on-highway fleets, general haul, construction, agriculture, transport operators, and diesel pick-up trucks. Make sure this fits by entering your model number. Also, it makes for a great buy and it is ideal for great protection.

Finally, the shell rotella 5w40 synthetic engine oil is designed for easy handling and pouring.

Almost all customers opine that the oil has a turbo, even better. Also, a few strongly agree that the oil is approved for all diesel motors. Further, they say that the oil is one of the few approved easily available full synthetic oils.

• This is a brand new clean funnel and I probably won't be using this oil again.
• This is a great price on the most versatile oil.
• This is best for long intervals between oil changes and maximum protection from wear.
• Better cold-cranking properties and low-temperature pumpability for reaching critical engine parts faster.

Best For High Performance: Pennzoil 5W40 Synthetic Engine Oil

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Compared with other oils in this category, the Pennzoil 5W40 Synthetic Engine Oil has a convenient design. The pennzoil 5w40 synthetic engine oil is very happy, going strong and it is ideal for great protection. Make sure this fits by entering your model number. Further, this has excellent performance in extreme temperatures and protects against low speed pre-ignition (lspi) in modern turbocharged direct injection gasoline engines.

The oil is readily available and it is great for auto repair. In addition, the oil works great and it can qualify for free shipping. Most importantly, the pennzoil 5w40 synthetic engine oil is made from natural gas, not crude.

Most buyers quickly discovered that the oil is a much higher quality synthetic than oem oil and cheaper. In addition, a few strongly agree that the oil comes out as clear as it goes in after 3k miles. Further, a few say that this is high quality oil and it 'll probably perform better than the motorcycle oil that may be more expensive. Consequently, customers were very happy to recommend it to friends and families.

• This is porsche a40 approved to add to that has a health rating of 3.6.
• This is not documented on the container. You need ultra platinum 5w-40.
• This is used for corrosion protection and it is highly recommended.
• This oil is api sncf and meets the bmw ll.

Best For Long Oil Life: Valvoline 5W40 Synthetic Engine Oil

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Valvoline offers a variety of oil for personal choice and yet maintains quality in all the variants. The Valvoline 5W40 Synthetic Engine Oil is because of this legacy that people have trusted valvoline products in their vehicles from the model to today's newest models. Make sure this fits by entering your model number. In addition, it is white, can wait for a great deal and it is very good.

The oil is the “the only one” endorsed and recommended by cummins and features exceptional oxidation resistance, outstanding wear protection and superior deposit performance compared to industry requirements. And, it is effective and it is good for longer life. Lastly, the valvoline 5w40 synthetic engine oil is specially designed for hardworking trucks and equipment in both on road and off highway applications.

Almost all customers found that the oil is great oil for ford 6.0. In addition, a few say that the oil is not compatible with the mb 229.51 engine oil specification. And, they strongly agree that the oil is suitable for use in your 2016 ram 1500 with a 3.0l diesel. In conclusion, most buyers call oil functionally comfort, and no one questions it.

• This is designed for a gasoline engine.
• Superior wear protection for hardworking heavy-duty trucks and equipment.
• The valvoline motorcycle or valvoline atv oil meet these two specifications.
• Delivers extreme protection for diesel and gas engines.

Best With Amazing Price: Castrol 5W40 Synthetic Engine Oil

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The Castrol 5W40 Synthetic Engine Oil should be able to handle its purpose and duties with ease. The castrol 5w40 synthetic engine oil makes for a great buy and it does the job. Include conventional, synthetic, diesel, bio - based, hybrid ( blends of conventional and synthetic ), and recycled oils. These standards can apply to both gasoline and diesel - powered engines and are often more demanding than ilsac/api requirements.

Finally, the castrol 5w40 syntheticengine oil can often cost more than conventional motor oil.

Almost all buyers agree that the oil works well and to add to that, it is easy to pour a bottle design. Also, they say that the oil is good for your engine between changes. Further, they strongly agree that this is good oil for a great price, but cheaper oil can be found locally.

• This is the perfect oil for the picky volkswagen connoisseur.
• This is the vwoil used by the dealerships.
• This is a full synthetic oil, meaning crude oil is not used in making it.
• This is ideal for true high mileage engines.

Best For Synthetic Oils: Schaeffer Manufacturing Co 5W40 Synthetic Engine Oil

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The Schaeffer manufacturing co 5w40 synthetic engine oil should be able to handle its purpose and duties with ease. The Schaeffer manufacturing co 5w40synthetic engineoil protects against oil aeration and it is compatible with conventional oils. Make sure this fits by entering your model number. Moreover, this is suitable for using api ck-4 specifications.

Most importantly, the Schaeffer manufacturing co 5w40 synthetic engine oil has excellent cold cranking startability, is green and it is highly recommend.

Almost all buyers found that the oil is the same oil as the older label schaffer’s 9000. And, a few strongly agree that the oil is a top tier synthetic oil. Furthermore, a few also found that this oil can take longer drain intervals.

• Keep-clean performance: superior soot busting, deposit-dispersing capability.
• Oil strength: withstands higher heat range than conventional oils.
• You need it to last as long as possible.
• Friction modified with micron moly and penetro.

Best For Car: Mercedes Benz 5W40 Synthetic Engine Oil

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We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a convenient and appropriate oil. The Mercedes Benz 5W40 Synthetic Engine Oil is exactly that - it's a simple oil that hits all the right notes. The Mercedes benz 5w40 synthetic engine oil can be good quality, is made for oil pans and it is highly recommend. Make sure this fits by entering your model number. And, it comes with part number, can search for brand name and it is perfect for great quality. Lastly, the mercedes benz 5w40 synthetic engine oil comes with excellent service, is green and it is safe.

Almost all customers agree that the oil will have a computer system to determine when your oil needs changed. Furthermore, a few also found that the oil works well for 2006 ml350. Make sure you buy your filter as well. Moreover, they also found that this oil is real, mercedes benz 229.5 spec for gas engines. Obviously, this oil passed the test and had very satisfied buyers eager to share their experience.

• 1 liter / 1.056 US qts.
• This is used for your 06 w211 e350.
• This is the gas engine motor.
• This takes 7 4 quarts, according to the Mercedes Benz website.

Best For Hemi: Motul 5W40 Synthetic Engine Oil

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Best part: Motul 5W40 Synthetic Engine Oil costs comparatively low and it is available to ship in 24 hours. The motul 5w40 syntheticengine oil is designed for last generation cars, powered by turbo diesel direct injection or gasoline engines, euro iv or euro v emission regulation compliant. This product can expose you to chemicals which are [are] known to the state of California to cause cancer and birth defects or other reproductive harm. And, the oil is great with great stuff, works phenomenally and it works great.

The oil is soft and it is highly recommend. Also, it is used for track days, is designed to be worth every penny and it works perfectly well. Lastly, the motul 5w40synthetic engineoil is great with good service and it is soft.

Most customers quickly discovered that the oil is not compatible with oem oil filters. Also, they also found that the oil is a great motor oil for glk250 in the hot and humid Texas climate. Furthermore, a few also found that the oil is used to run rotella t6, and switched to this. Overall, many buyers have used the motul 5w40 synthetic engine oil for more than a few months without letup, and it shows no sign of giving up.

• This is designed for diesel particulate filters (dpf) and three - way catalytic converters.
• This is a phenomenal oil replacement if your car meets the requirements.
• This oil does improve mileage and adds pep to the vehicle.
• High performance 100 percent synthetic lubricant approved by many car manufacturers.

Best For Outstanding Protection: Mobil 1 5W40 Synthetic Engine Oil

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We would, of course, be remiss if we didn't mention Mobil 1 5W40 Synthetic Engine Oil for daily purpose. The mobil 1 5w40 synthetic engine oil is great for summer evenings and it is usable. If you want total engine protection, excellent fuel economy and a product recommended for applications under warranty, you want mobil 1. The world 's leading synthetic motor oil, it features a proprietary super synthetic.

The oil provides outstanding protection for diesel engines. Finally, the mobil 1 5w40 synthetic engine oil is recommended for diesel-powered pickup trucks built by ford, general motors, gmc and Dodge and meets diesel engine requirements of cummins, power stroke, duramax and navistar.

Almost all customers agree that the oil is a lot cheaper than on Amazon. Moreover, a few say that oil is widely available everywhere, including the truck stops. Moreover, they strongly agree that note: if this is an oil that is recommended based on your engine and the location you live.

• Exceptional resistance to high-temperature varnish and low-temperature sludge deposits to help keep engines clean.
• This provides wear protection and reduces oil consumption with its shear stability.
• This offers outstanding wear protection, oil consumption control and performance reserve.
• This protects at oil temperatures as high as 400 degrees fahrenheit.

Best For Cheap Price: Mobil 5W40 Synthetic Engine Oil

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The Mobil line of oil comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The mobile 5w40 synthetic engine oil is great for low viscosity and it allows for better fuel mileage. Make sure this fits by entering your model number. This product meets or exceeds the requirements of the latest api, acea, and global industry specifications for diesel engine oils, as well as the requirements of virtually all major American and European engine manufacturers.

The oil is recommended for use in a wide range of heavy-duty applications and operating environments found in the on-road transport and off-road mining, construction, and agricultural industries. Moreover, the oil is very good and it comes with great stuff. Lastly, the Mobil 5W40 Synthetic Engine Oil is designed for truck engines and it going strong.

Almost all customers quickly discovered that the oil was designed for DPF exhaust use. In addition, they say that the oil is easy to order, shows up as advertised. Also, a few strongly agree that oil is great oil for a dirt cheap price. In short, at the price, they believe that they got a steal of a deal with it.

• This allows for great performance and it is best for cold starts.
• This is professional, looks good and it is perfect for a lawn mower.
• This is the best oil you can buy for a diesel engine.
• For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.