7 Best 5W-20 Oils of 2021

Jerry Wilson
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Today, we’ll take a look at 7 of the best 5W-20 oils of 2021. For those who are not sure about what a full synthetic oil is, here is a quick rundown.

A full synthetic oil is one that is manufactured by blending up to 10 different chemical bases to create its synthetic base. It then gets a synthetic hydrocarbons (fractured crystals) blend in and then gets mixed with some specialised technology to create a full synthetic oil.

A semi-synthetic oil is one that has minimal 10% to 20% synthetic base in it.

Just so you can understand with me in this article, all of the oils below have high-tech low-shear viscosity improvers, zinc phosphate anti-wear additives, and detergent/dispersant additives that are blended in to make sure that your engine gets the maximum of protection.

NameCategoryProduct
Valvoline High MileageBest OverallValvoline High Mileage
Castrol 03083 EDGE 5W-20 Advanced Full Synthetic Motor OilBudget PickCastrol 03083 EDGE 5W-20 Advanced Full Synthetic Motor Oil
Royal Purple 36520-6PK HPS 5W-20 Synthetic Motor OilUpgrade PickRoyal Purple 36520-6PK HPS 5W-20 Synthetic Motor Oil

1. Valvoline High Mileage

Our rating: 9 / 10

Valvoline High Mileage

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Pros:

  • High Mileage motor oil
  • Quick and easy to change oil
  • Affordable with great quality

I’m always on the look-out for affordable motor oil that provides the best protection for my car, at an affordable price. I’ve been using the VV High Mileage Motor Oil, to protect my vehicle from wear and tear and keep everything running smooth.

It has plenty of great features and is easy to use. This 5 quart, energy conserving formula is perfect for everyday usage and keeps my engine running with the least amount of friction creating a strong barrier against breakdown. Keeps your vehicle running smooth and saves you from costly repair bills.

VV Technologies use advanced technology to create a superior motor oil. Ideal for 2000 miles or one service interval, this superior formula contains synthetic blend technology that has been sprinkled with a handful of vital additives to create an oil that helps extend your engine’s life while maximizing engine performance.

2. Castrol 03086 EDGE Extended Performance 5W-20 Advanced Full Synthetic Motor Oil

Our rating: 9 / 10

Castrol 03086 EDGE Extended Performance 5W-20 Advanced Full Synthetic Motor Oil

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Pros:

  • Enriched with ZDP and ZTP additives
  • Reduced frictional resistance
  • Safe for turbocharged engines and gas engines as well
  • Excellent high temperature capability

Castrol can be rightfully considered one of the top names in the automotive oil business. And unsurprisingly, one of their instant hits is this synthetic 5W-20 oil, which manufactured to provide an array of benefits to any car owner. It can be put into a wide range of applications and vehicles because of its superbly formulated ZDP ZTP additives. They can deal with extreme pressure and heat; hence, preventing damage to the car’s engine in the long run. As a result, you will benefit from a fuel efficient car that runs smoothly day in and out. Being compatible with both turbo and gas engines, the Castrol 03086 EDGE is a great choice in terms of quality and price.

This oil is already known for its good lubricating abilities. It can improve your car’s mileage and engine lifespan. Although the price is a bit higher than what most would expect, it has been designed to live up to the hype. It also prevents corrosion and corrosion damages your car’s parts.

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

Our rating: 9 / 10

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

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Pros:

  • Exceptionally clean burning
  • Long lasting viscosity
  • Easy to manage
  • Safe for your car's engine
  • Goes great with turbo-charged motors
  • Cost effective
  • Performance that's comparable to synthetic oils pricier than this
  • Minimal environmental impact
  • Safe for use in catalytic converters and oxygen sensors

Cons:

  • Not as efficient as synthetic oils
  • Stings the eyes a little upon contact
  • Can be difficult to find in some stores
  • Not perfectly clear (almost looks white at first)

To start off on a good foot with synthetic oil, Castrol has developed a remarkably well-rounded product. It feels good enough to use in virtually any kind of car engine, and boasts plenty of features to boot.

If you're used to conventional oils (and especially if you own a sports car), you'll immediately notice how much easier this product is to manage. Other than being quite thin, Castrol's oil has a surprising lack of any visible pollution. It's hardly static; after all, Castrol claims that its oil has been fully tested and is safe for use in catalytic converters and oxygen sensors. Not only will it keep your engine clean, it will keep it happy.

4. Mobil 1 120763 Synthetic Motor Oil 5W-20

Our rating: 9 / 10

Mobil 1 120763 Synthetic Motor Oil 5W-20

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Pros:

  • Multi grade synthetic oil
  • Includes cleaning agents
  • Contains antioxidant

This product from Mobil 1 is a top performer in automotive motor oil category. It does not contain any bad smelling agent and does not produce any harmful gases. On the contrary, it is a best performing motor oil available in market.

FM-2025 is suitable to use for many engine types. The multi grade concept of this oil helps in improving the performance of the engine. This oil is also suitable to use in other components of the car like car’s transmission system, whizzkid, etc. This product contains cleaning agents which remove all the types of contaminants from engine.

This oil is made with help of nano technology which means that it provides the lubrication to the engine. It is known to work very well even at the temperatures of -20 degrees.

5. Valvoline Advanced Full Synthetic SAE 5W-20 Motor Oil 5 QT

Our rating: 9 / 10

Valvoline Advanced Full Synthetic SAE 5W-20 Motor Oil 5 QT

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Pros:

  • Reduces fuel economy
  • Good viscosity range
  • Cheap
  • Formulated to meet API SN
  • Ideal for turbocharged and non-turbocharged engines
  • Can be used in vehicles that are 2010 and newer
  • Helps increase operating temperature resistance
  • Reduces wear and tear of parts
  • Easy to clean up after spills
  • Perfect for year-round use in all weather conditions

Cons:

  • Thick viscosity could be a problem for older cars
  • Can sometimes attract water for short amounts of time

The Valvoline Advanced full synthetic SAE 5W-20 motor oil 5 QT is one of the best 5W-20 oils you could pick. It offers a good viscosity range at a very affordable price, making it the perfect choice for year-round use in all weather conditions.

This oil is ideal for year-round use and has been formulated with properties that are designed to reduce viscosity for cold starts and increase resistance to high temperatures. It's also optimized to protect your engine so that it runs at the optimal temperature.

6. Royal Purple 36520-6PK HPS 5W-20 Synthetic Motor Oil

Our rating: 8 / 10

Royal Purple 36520-6PK HPS 5W-20 Synthetic Motor Oil

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Compatible with most gasoline or diesel engines.

Nearly eliminates engine deposits.

Extremely effective wear protection.

7. Pennzoil 550038330 Ultra Platinum 5W-20 Full Synthetic Motor Oil

Our rating: 8 / 10

Pennzoil 550038330 Ultra Platinum 5W-20 Full Synthetic Motor Oil

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Pros:

  • It has a very low viscosity index
  • Affordable
  • It is able to reduce engine wear
  • It is easy to apply
  • It is highly protective
  • It is able to protect the engine from a lot of wear and tear
  • It has outstanding protection to the engine as promised for the price it is sold for.
  • It has a very stable viscosity

Cons:

  • The capacity of the container is very small.

Frequently Asked Questions (FAQ)

What is the best 5w 20 synthetic oil?

There are many reasons why synthetic oils are superior to conventional oils.

Synthetic oils, in addition to providing a greater range of temperature protection, also extend the life of the engine and allow the engine to run at a higher level of efficiency. The result is a significant drop in emissions.

When you talk about the best synthetic oils for your vehicle, there are a few you should consider. Here are our picks for the top synthetic oils:

  • Mobil 1
  • Synthetic High Performance 0W-40
  • NextGen Conventional Motor Oil 5W-20
  • Shell Rotella T6 5W-20
  • Royal Purple 5W-30
  • Royal Purple 5W-40
  • QA1 Non-Detergent Oil 5W-30
  • Valvoline Synpower High Performance 0W-30
  • Valvoline Max Life High Mileage 0W-30

Which is better 0w 20 or 5w 20?

If you're a regular synthetic motor oil user, then you've likely confused yourself wondering what an 0w 20 vs 5w 20 signifies. The 'w' stands for winter which actually refers to the lower weight percentage on the viscosity scale. Both 0w 20 and 5w 20 are 5-weight oils. This can be confusing because a lower number usually means a thicker/heavier oil, and this isn't true with engine oils.

A 5w 20 synthetic oil will be thinner and will flow better at low temperatures. This is important for cold climates or during the fall and spring months. Oil manufacturers produced the 0w 20 oil for use in warmer climates; however, many people use them in low-temperature environments as well.

If you're considering using a 0w 20 or 5w 20 oil in cold weather, we suggest turning down the heat of your garage before spending the extra money on a 0w 20 to help protect your vehicle.

Is there a 5w20 conventional oil?

Sure. 15W-40 would be the closest conventional oil viscosity. 15w-40 conventional Oil is a medium-weight oil with a viscosity measurement of 15W (winter) and 40 (thick). This gives it an advantage in cold weather start-up, while also allowing for enough lubrication to safeguard motor parts in a warm engine.

There are no differences in viscosity between conventional and synthetic oils, for both start up and operating temperature.

Is 10w30 OK for 5w20?

The w rating system comes from the Society of Automotive Engineers, which developed a grading system that grades oils by viscosity … most commonly measured in centistokes.

You will often see the w and viscosity rating numbers separated by a slash, such as 5w30. This denotes the percentage of oil, by weight, that is after the viscosity index has taken effect. … the rest remains the same.

This means the 5w30 contains five percent 30-weight oil, or 0.5 percent.

That means that the remaining 99.5 percent is made up of a 20-weight oil.

This system ensures a consistent viscosity among different types, weights, and brands of oil. As a result, you don't have to experiment with weight levels by mixing/matching different brands of oil.

Conclusion

The best 5W-20 oils have been selected from a list of products that passed muster in our tests for quality and price. Without out list, you would have to look at a number of brands and then figure out what the best brands are among their selections. Since we have gone to the trouble for you (and probably done the math for you that you would have been doing anyway), you can just go directly to our list of picks.

Our Recommendation

NameCategoryProduct
Valvoline High MileageBest OverallValvoline High Mileage
Castrol 03083 EDGE 5W-20 Advanced Full Synthetic Motor OilBudget PickCastrol 03083 EDGE 5W-20 Advanced Full Synthetic Motor Oil
Royal Purple 36520-6PK HPS 5W-20 Synthetic Motor OilUpgrade PickRoyal Purple 36520-6PK HPS 5W-20 Synthetic Motor Oil