Home / Automotive Reviews / Lubricants & Additives / Best 5w-20 Synthetic Oil [Top Reviews & Buyers Guide] 2023

Best 5w-20 Synthetic Oil [Top Reviews & Buyers Guide] 2023

Motor oil plays a vital role in guaranteeing your vehicle’s engine is always in exceptional condition. In your search for the perfect oil, you need to confirm whether it comes in the right viscosity and contains any additives if it’s synthetic or conventional mineral oil.

However, the search for the best 5w20 synthetic oil is challenging and overwhelming due to the many options available in the market. This shouldn’t be a problem in the future after reading through this detailed 5W-20 oils review. You’ll also get to know what to look for when deciding which synthetic oil best suits your needs.

Top 10 Best 5w-20 Synthetic Oil On The Market

RankingsNamePrice and More Details
Pennzoil Ultra Platinum - Best 5w20 Motor OilClick Here
Castrol Edge Advanced Synthetic Oil FormulaClick Here
Mobil 1 Advanced High-Performance Motor OilClick Here
Royal Purple 5w20 Oil With Additive TechnologyClick Here
Mobil Extended Performance Motor Oil SAE 5w20Click Here

Choosing the proper full synthetic oil will provide a boost when it comes to fuel economy. The right synthetic blend will keep your engine running as it came from the factory or dealer. With the help of some experts, we have put together a list of the best motor oil blends with 5w20 viscosity grade.

1. Pennzoil Ultra Platinum Full Synthetic Motor Oil SAE 5w20

Valvoline Full Synthetic High Mileage SAE 5w20

If you’re searching for an oil that provides your engine with the best possible protection, the Pennzoil Ultra Platinum is undoubtedly the ideal choice. This oil uses the PurePlus gas-to-liquid technology, making it stand out from other synthetic oils in the market. It also contains high-performance additives that keep it functioning correctly at different temperatures.

Using this oil guarantees your engine and pistons remain clean plus nice. Its unique formulation offers you stability, which prevents burning off and ensures the seals work correctly. Therefore, you’ll never have to worry about your vehicle having leaks ever again. Moreover, another welcome appealing benefit of this oil is it lasts very long.

You need to consider Pennzoil Ultra Platinum since this brand is known for its outstanding reputation. This oil, in particular, is loved because it provides a more efficient, quieter, and more responsive engine performance. You can also use it for old or modern engines, hence why it’s considered one of the best all-round full synthetic oil.

2. Castrol Edge 5w20 Advanced Full Synthetic Motor oil

Castrol 03083 EDGE 5W-20 Advanced Full Synthetic Motor Oil

The Castrol brand is among the most famous choices for vehicle users across the globe if you’re on a budget. With it, you get to improve your car’s engine performance while still making sure it’s quieter and smoother. Therefore, you shouldn’t worry when using it regardless of your vehicle’s brand as it’s suitable for Ford, Porsche, Mercedes, and many others.

By using this synthetic oil, your oil is provided with superior protection. This is because it does a better job protecting against wears, oxidation, and deposits. If you wish to prolong your engine’s lifespan, minimize its wear and make its operation a lot smoother, look no further than the Castrol Edge 5w20 advanced synthetic oil.

After using this synthetic oil for a while, you’ll realize an improvement in your vehicle’s overall performance. This is something you wouldn’t have noticed had you opted for the standard conventional and synthetic oil blends. Furthermore, it does an excellent job of safeguarding the oil when it’s placed under high pressure.

3. Valvoline Maxlife High Mileage With Maxlife Technology Synthetic Blend

Valvoline High Mileage with MaxLife Technology SAE 5W-20

This is also another great choice when searching for a 5w 20 full synthetic oil. The reason for this is that it comprises of seal conditioners that restore the engine’s aging seals, thereby assisting it in preventing and stopping oil leaks. While still guaranteeing superb performance, it’s still available at an affordable price.

Using this oil, you also get added wear protection that contains additional detergents that remove deposits and sludge, thereby maintain your high-mileage engine cleaner. It also offers added wear protection, which prevents engine wear. The antioxidants it has assisted in averting the breakdown of this synthetic oil plus the clogging of your car’s engine with deposits and sludge.

The Valvoline Maxlife synthetic oil does a remarkable job minimizing and stopping leaks. It’s also a thick enough, thereby an ideal choice for extending a seal’s life for car engines with more than 100,000 miles. Therefore, you should consider getting this synthetic oil if you want a smoother, quieter, and generally improved engine performance.

4. Castrol GTX Magnatec 5w20 Full Synthetic Motor Oil

Castrol 03063 GTX MAGNATEC 5W-20 Full Synthetic Motor Oil

In your search for viscosity grade 5w20 synthetic motor oils, you must have stumbled upon the Castrol GTX Magnatec full synthetic motor oil. This oil is budget-friendly while still ensuring your engine delivers a silent and smooth performance. It also does a great job improving your care’s performance almost immediately and long-term better results.

It does a considerable great job of bettering high mileage on various car models and is extremely efficient on loud car engines. This synthetic oil is packaged in a conveniently designed bottle. In addition to this, you get to choose the confutation, size as well, a number of bottles when buying this oil.

When using this oil, the vehicle’s engine gets an additional layer of protection, which remains active from the time you start your car. As a result, it does an exceptional job of minimizing engine wear and ensuring it remains in superb condition. With all these appealing attributes, you need to consider this product in your search for the best 5w20 synthetic blend oil.

5. Royal Purple API-licensed SAE 5w20 Synthetic Oil – 5 Quart

Royal Purple 51520 API-licensed SAE 5W-20

When looking for synthetic oil that guarantees optimal motor protection, the Royal Purple is a perfect pick. You can get this synthetic oil in different sizes, and using it regularly improves your car’s horsepower and engine, thereby delivering better performance. It’s for this reason, it’s considered to be one of the best synthetic oils in the market.

With this synthetic oil, you get an all-in-one product that cleans, cools, and lubricates your vehicle’s engine. You can also use it for different kinds of motor oils from bio-based, conventional, synthetic, diesel, recycled oils, as well as hybrid, both conventional and synthetic. Moreover, the continued use of this product does an excellent job minimizing engine wear.

Another appealing aspect of this product is that it’s full synthetic, meaning it doesn’t contain any crude elements. In cold weather, it has a viscosity of 5, and its SAE 5W-20 weight means it has a 20 rating at standard temperatures. In addition to this, the use of this oil offers you oxidation stability.

6. Shell Rotellas Gas Truck 5w20 Synthetic Motor Oil – 5 Quarts

Shell Rotella Gas Truck Full Synthetic 5W-20

If you’re looking for a well-priced synthetic oil that’s suitable even for high mileage cars, this is the ideal synthetic oil for you. It also incorporates proprietary technology, which assists in preventing oil breakdown, deposits, and engine wear. Furthermore, it’s available in a new formulation, which does an incredible job of enhancing oxidation performance for better resistance to breakdown at high temperatures.

The Shell Rotellas synthetic oil does a great job at controlling engine wear, at a rate that’s 37% better to the maximum wear requirements according to the PI CK-4 engine wear tests. When using this oil in your car, you’ll experience reduced burbling off and blow-by. It also breaks down a lot slower to the standard oils.

Additionally, this product is also of exceptional quality, something the Shell brand is usually known for across the globe. Using it is also very easy, and you can get in either single or multipacks. Therefore, you now understand why this synthetic oil is a popular choice among many vehicle owners looking for enhanced vehicle performance. Most experts consider this the best synthetic motor oil for trucks.

7. Mobil 1 High Mileage Advanced 5w 20 Full Synthetic Motor Oil

Mobil 1 5W-20 High Mileage Advanced Full Synthetic Motor Oil

If you’re looking to buy the best synthetic formula, then the Mobil 1 high mileage is an excellent choice. You should get it if your car’s engine has traveled for more than 75,000 miles. In addition to this, it’s an excellent choice if your engine needs additional care to prolong its life.

The Mobil 1 High Mileage does a great job of catering to the needs such as high mileage as it focuses on improved wear protection. It also does a great job of guaranteeing a better level of seal conditioner by preventing leaks as well as protecting your car’s engine leaks. This goes a long way in improving your car’s overall performance.

An appealing aspect of this synthetic oil is that it has additional features to address high mileage engines: It does this while still making sure not to compromise on its original duty of safeguarding and lubricating the engine. Moreover, this oil provides the engine with great levels of sludge reduction, but brief intervals of an oil change is necessary from time to time to ensure all sludge is decimated or cleaned out.

8. Liqui Moly Premium Special Tec AA 5W20 Synthetic Motor Oil

Liqui Moly 2259 Special Tec AA 5W-20 Synthetic Motor Oil

When searching for the best synthetic oil for your car’s engine, it can be confusing due to the many options that are available. However, one option that you need to consider is the Liqui Moly Premium synthetic motor oil, which prolongs the engine’s life and greater shielding against wear. It also promotes quick delivery of high lubrication reliability at low and high temperatures.

This oil also performs well at promoting quick oil delivery even at low temperatures. When using it, you’re guaranteed a quieter and smoother engine performance while enhancing the consumption of oil. It’s also available in a conveniently designed spout, and it almost is unused at mileage intervals of 5,000 miles. Therefore, you’ll not need to do any oil changes for an extended duration since it holds up oil pretty well.

Liqui Moly Premium comes in a grayish tone because it has a strong additive package. It’s a popular choice among most mechanics when working on German cars, but one drawback is its high price. The design of its cap might also be fairly complicated to open, and this makes pouring a lot more complicated. One of the best oils that can keep your gasoline engine running smoothly.

9. Mobil 1 5w20 Oil Extended Performance Synthetic Motor Oil

Mobil 1 Extended Performance 5W-20 Motor Oil

If you wish your vehicle’s engine to enjoy an all-weather performance, unmatched protection from engine wear, durability, and efficiency, this synthetic oil is meant for you. It’s this combination of many fantastic benefits that make it a preferred choice among luxury and performance manufacturers for running their vehicles immediately they’re out of manufacturing.

This synthetic oil has a unique combination of performance-enhancing and cleaning additives. In addition to this, it incorporates SuperSyn Technology that gives it anti-wear characteristics in both high and low temperatures. Due to this, the Mobil 1 5w20 extended performance synthetic oil is a great option for different kinds of climates.

When using this oil, you should expect a great boost in the car’s engine fuel efficiency, responsiveness, and smoothness. You also only need to do oil changes after 15,000 miles, and it’s thus evident why you should opt for it when searching for the best synthetic oils despite its expensive price tag.

10. Valvoline Synpower Maxlife High Mileage Motor Oil SAE 5W20

Valvoline Full Synthetic High Mileage SAE 5w20

Despite being last on this list, this doesn’t mean the Valvoline Synpower Maxlife High Mileage is any inferior. You should thus consider it when searching for a high-quality 5w-20 synthetic oil. Its excellent performance has made it a popular choice for almost all car owners in North America, making it very versatile.

The best thing about this synthetic oil is its price, which is affordable, considering its exceptional quality. It’s also useful for almost every engine type, including supercharged, turbocharged, and naturally aspirated. Using this oil also provides you with incredible protection even under severe driving conditions in both cold temperatures and high temperatures.

When using this high mileage oil, you never have to worry about sludge buildup. It also offers you with greater mileage than the other synthetic oils while still enhancing acceleration. Furthermore, it’s easy to use something that has made it a favorable choice among many vehicle owners. It’s known to work well in cold temperature conditions.

Best 5w-20 Synthetic Oils Buying Guide

You’ll need to consider several factors when searching for a full synthetic motor oil. By taking into account such considerations, you’ll be able to determine which oil best meets your needs. These different features between different oil should be your guide to deciding whether a specific oil provides you with a solution to any issue you intend to address.

What to look for when buying 5w20 synthetic oil

Most of these oils are a synthetic blend, and they come in 1 quart and 5 quart bottles. We recommend the 5 quart bottle because it is practical. Having a bunch of 1 quart bottles laying around could become a mess. Also, these 5w20 oils offer the best performance when it comes to high mileage vehicles. These few things are key to choosing the right oil synthetic formula for you:

Engine Protection

To prolong the engine life of your car’s engine, buying a synthetic oil is the way forward. This is because the full synthetic blend provides you with a greater degree of natural solvency, which does a better job of removing and cleaning deposits. As a result, your engine enjoys being deposit and sludge-free, and this prolongs its lifespan and that of engine seals plus other components.

Low-Temperature Resistance

One vital advantage of synthetic oils is the ability to flow better even under extreme temperatures, especially during winter. This is possible because its viscosity resistance allows it to flow smoothly no matter how cold the temperatures are outside. Therefore, your vehicle is less prone to breaking down because of cold starts, and the same applies even during hot weather.

Reduced Engine Wear

Synthetic oils are usually formulated with a high degree of natural solvency. This is possible since it does a better job removing and cleaning deposits. As a result, your engine is free of any deposits and sludge, thereby allowing it to flow efficiently and smoothly. This goes a long way in prolonging the engine’s lifespans, engine seals, and other components.

Increase Fuel Efficiency

The use of synthetic oils lessens the extent of friction happening between vital parts of your car’s engine. This consequently allows your engine to run a lot more efficiently and smoothly. Due to this, your vehicle’s mileage increases, and this translates to higher fuel mileage. Therefore, you can spend way more time on the road as well as save more money and time going to the gas station.

All the type of oil with 5w-xx viscosity levels explained

Distinguishing the different synthetic blend formulas can get tricky. Although most of them are designed to provide high performance, you should always use the viscosity recommended by the vehicle’s manufacturer.

  • 5w-20 Synthetic Oils : This synthetic oil isn’t as thick compared to these two discussed below. As a result, it doesn’t generate lots of friction thanks to the thinner viscosity. Consequently, this produces less drag on parts of your car’s engine, such as pistons, valvetrain, and crankshaft. It also moves across parts of the engine with ease, and this makes it an ideal choice.
  • 5w-30 Synthetic Oils: These motor oils are a better choice as it makes your car’s engine sound like its new due to the better lubrication. It also offers your vehicle’s engine with improved protection as well as improving fuel economy. This oil is ideal for multi-valve, gasoline, and diesel engines, plus it enhances the overall performance.
  • 5w-40 Synthetic Oils: This full synthetic oil is crude based and is a perfect choice for gasoline and diesel engines. It’s usually used for vehicles that still have a warranty because it guarantees great thinning resistance against heat. In addition to that, it enjoys low volatility, minimizes oil utilization, and appropriate for cars using leaded and unleaded gasoline.

Difference between conventional oils and synthetic oils

Conventional oils are filtered from crude oil, whereas synthetic crude oil is made from artificial compounds that are broken down and then rebuilt into petroleum molecules. This is the reason why synthetic oils contain fewer contaminants compared to conventional oils. As a result, it lowers the risk of buildup and sludge in the engine.

The breakdown of synthetic oil takes longer compared to conventional oil. Therefore, it lasts longer before it necessitates replacement. For instance, if you need to replace conventional oil after every 4,000 miles, you’ll need to replace synthetic oil once in 6,000 to 7,500 miles. This makes synthetic oil an ideal choice for your car than conventional oil.


A good full synthetic oil will provide much better fuel economy than any conventional motor oil. It also helps when it comes to removing sludge and deposits. These are some motor oil questions that are common in the industry:

What is 5w20 oil good for?

The 5 stands for oil viscosity at low temperatures, whereas the twenty represents the viscosity at high temperatures. Besides high temperature protection, It is a high performance motor oil that can keep your engine running smoothly. More, this synthetic blend products come with special anti wear agents for extra engine protection.

Using a full synthetic oil is great for your vehicle because it works well in a broad range of engine types. It’s also ideal for use in a broad range of temperatures due to its thinner nature, which allows it to flow faster across the engine. Because of this, you should opt for the 5w20 oil if you live in a cold area as it still gets to flow with easy even if the temperature falls to extreme levels.

Does it work for gasoline and diesel engines?

Yes, it does work on both diesel and gasoline engines. Therefore, you should be the go-to choice when running both these engines since it guarantees improved performance. The motor oils which have a viscosity of less than 5 create less friction due to its thinner viscosity. This means engine parts such as the crankshaft, pistons as well as valve train don’t have to deal with a lot of drag.

Is 5w-20 oil thicker than 10w-30 engine oil?

No, 5w-20 is less thick compared to the 10w-30 synthetic fuel. Due to its thickness, the 10w-30 synthetic oil is ideal for areas with high temperatures, unlike the 5w20, which is meant for high-temperature regions.

The ignition of the 5w-20 also happens a lot faster than the 10w-20 and is more economical, too, since less power is needed to power it through in the engine.

Because 10w-30 is thicker than 5w-20, it leads to the unbalanced circulation of oil in the areas surrounding the piston. You should thus first assess your situation before deciding which of these two oils is a suitable choice.

What is the best 5w20 engine oil for trucks?

The best synthetic engine oil you should buy for your truck is the Shell Rotellas full synthetic motor oil. This is crucial because it can be used both in cold temperatures and hot temperatures while still guaranteeing great protection levels.

Furthermore, its versatility makes it an excellent choice since you can use it for turbocharged, naturally aspirated as well as supercharged engines. You will notice a rapid improvement in fuel economy after you start using this motor oil.

When using it, you also are guaranteed no sludge buildup and improved mileage than other options on the market. Also, It’s also affordable and easy to use, making it a popular choice among many truck owners. When looking for the best full synthetic oil for trucks, this is your best pick.


After reading through this in-depth article, you have better insight into the best 5w20 synthetic oils. This is especially helpful if you didn’t know which option to go for due to the huge number of brands sold on the market, with each claiming to be the best. However, this shouldn’t be the case anymore, and know which of these synthetic motor oils mentioned above is best suited for your car’s engine.

Last Updated on: October 20, 2023

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