The Best Motor Oil to Keep Your Engine Operating Smoothly

A car engine is prone to aging, and as this takes place, oil starts to burn off between changes causing the oil sludge and deposits to build up in the engine. The build-ups shorten the life of your car’s engine gradually. That’s why a regular oil change is important. For best results, you need to use the best motor oil available.

Although this is an extra cost on top of insurance and gas, it is worth investing in. However, it is not an everyday expense.

Looking for the best motor oil can be tricky, with many brands and options to choose from on the market. Some of these oils are better than others, providing more performance and working harder to keep your engine clean. To help you get the top best motor oils, we have done deep research, and here, what we got for you. Keep reading!

1. Castrol EDGE Advanced Synthetic Oil

Castrol 03084C Edge 5W-30 Advanced Full Synthetic Motor Oil, 5 Quart
  • Advanced premium full synthetic motor oil to offer strength under...
  • Titanium strong for maximum engine performance
  • Reduces metal-to-metal contact across a range of different...
  • Protects the engine for the entire drain interval even under...
  • Decreases engine deposit formation to help maximize engine...

If you are looking for maximum performance and protection of your vehicle, we recommend Castrol Edge advanced synthetic oil. It is made using a Fluid Titanium technology, which helps the oil transform its structure under pressure to keep metal apart while reducing friction for maximum motor performance. 

This motor oil is 10-times stronger against extremely high temperatures oil thickening and is 6-times stronger against wear when compared to the industry benchmark. It has 0W grades which improve your fuel economy. Furthermore, it is ideal motor oil in both racing and street applications alike.

On matters concerning the viscosity, This advanced synthetic oil meets and exceeds the number of industry standards which includes, ACEA A1/B1, GM dexos1 Gen 2, ILSAC GF-5, SP Plus, and API SN.

This synthetic oil is available in different weights and variants. For instance, there the oil comes in two bottles; black and gold bottle. Although the prices of the two bottles are different, the gold one being pricier, the additional performance benefits are worth the increased cost. However, we recommend the Castrol motor oil that comes in a black bottle.


  • Reduces metal-to-metal contact.
  • Effective in decreasing engine deposit formation.
  • Provide strength under pressure.
  • Ideal motor oil for maximum performance and protection.


  • The cap leaks.
  • The oil turns black quickly.

2. Valvoline High Mileage Synthetic Oil

Valvoline High Mileage with MaxLife Technology SAE 10W-40 Synthetic Blend Motor Oil 1 QT
  • Enhanced anti-wear additives deliver a thick & durable layer of...
  • Added detergents help protect against sludge and deposits
  • Premium seal conditioners help treat and prevent leaks
  • Superior antioxidants resist motor oil breakdown in extreme...

If you are looking for the best high mileage synthetic oil for your old engine, count on Valvoline motor oil. This oil is all about keeping your old engine running like a brand new one. You don’t have to worry if your car does not match the specific SAE of 5W-30 since multiple grades are available. It has a formula that contains additives, which are ideal for aging engines. 

The additive formula includes seal conditioners, which revive aging engine seals that have weakened over time. The seal conditioner help prevents and stops leaks which are popular in high mileage engines. Additionally, it provides additional wear protection and detergents to keep old engines cleaner by bonding with and removing deposits and sludge, plus preventing future engine wear.

The formula also supplies antioxidants, which counteract oil breakdown by stopping deposit formation and engine-clogging sludge. The additives in the formula target the four key causes of engine breakdown; deposits, leaks, sludge, and friction. Conversely, you are recommended to use the motor oil once your engine surpasses 75,000 miles.


  • Has detergents to keep the old engine clean.
  • The seal conditioners are effective.
  • Great motor oil for older engine.


  • The cap of the oil leaks.

3. Mobil 1 Full Synthetic Motor Oil

Mobil 1 Extended Performance Full Synthetic Motor Oil 5W-30, 5 Quart
  • Mobil 1 Extended Performance full synthetic motor oil 5W-30 helps...
  • Helps to protect critical engine parts for up to 20,000 miles...
  • Meets ILSAC GF-6 standards to help provide low-speed pre-ignition...
  • Helps extend engine life by working to prevent damaging deposits...
  • Provides excellent internal engine heat protection (up to 500...

Mobil 1 synthetic oil features an advanced full synthetic formula that helps prevent sludge build-up and deposits for longer motor life and helping maintain stable oil viscosity. The oil also offers excellent overall wear protection and lubrication under several operating conditions thanks to a detailed balance of performance additives. Furthermore, it boasts great oxidation and thermal stability and exceptional control of oil breakdown.

Mobil 1 full synthetic engine oil exceeds ILSAC GF-6 principles to help offer low-speed pre-ignition (LSPI), timing chain wear protection, keeping your motor clean, and helping fuel economy. Besides the great low-temperature capabilities, this synthetic oil will help your motor start quicker in the cold for extended engine life and faster protection.


  • Effective in decreasing engine deposit formation.
  • Has great low-temperature capabilities.
  • Great synthetic oil.


  • Some customers complain that the oil makes their engine noisier.

4. Royal Purple 51530 High-Performance Synthetic Motor Oil

Royal Purple 51530 High Performance Motor Oil 5W-30 (5QT)
  • Better wear protection
  • Increased protection against LSPI
  • Increased fuel efficiency
  • Better protection for vehicle exhaust emissions equipment
  • Improved compatibility with fuels containing ethanol

If you are an auto enthusiast or a high-performance car owner, we recommend this oil; Royal Purple full synthetic oil. Royal Purple oil comes with a Synerlec additive, which works on a molecular level by creating additional strength ionic bonds with the metal surfaces in your vehicle’s engine. The oil reacts with increased strength, lubricity, and viscosity making the engine perform at its prime even when under excessive stress. Therefore, making it a great choice if you have a lead foot or want maximum engine performance.

The Synerlec additive also provides additional wear protection to keep your engine fit by removing deposits and sludge, plus preventing future engine wear. The oil also offers increased protection against LSPI and better protection for car exhaust emissions equipment. You can as well expect an increase in oil change intervals and fuel efficiency.

Royal Purple oil is the best synthetic motor oil you can buy if you deal with 5W-30 viscosity and when the engine gives you a redline several times per day. However, high-performance synthetic oil has a few drawbacks. If stored for long periods, the container leaks, and if you are on a tight budget, you might not afford to buy this type of oil.


  • Offers peak performance.
  • Offers wear and tear protection from friction.
  • Worth the price.


  • The cap of the oil leaks.

5. Pennzoil Platinum Full Synthetic Motor Oil

Pennzoil Platinum Full Synthetic Motor Oil 5W-30 – 5 Quart
  • Pennzoil Platinum 5W-30 motor oil is fully synthetic and designed...
  • Pennzoil synthetic motor oil provides improved fuel economy, on...
  • Helps protect engines from loss of horsepower
  • Excellent performance in extreme temperatures, faster low...
  • Advanced full synthetic oil formula provides wear protection from...

This synthetic oil has been made from PurePlus, a gas-to-liquid technology. This process involves converting pure natural gas into a high-quality, full synthetic base oil. The Pennzoil Company claims that its base oil is 99.5% pure, meaning it contains fewer impurities than motor oils that are made from crude oil. Besides having being combined with a high-performance additive system, using this motor oil could get you as much as 550 miles more annually in terms of fuel economy when compared to a dirty motor.

Pennzoil Platinum motor oil is ideal for turbocharged engines. It protects against the influences of low-speed pre-ignition. The oil flows faster in extremely cold temperatures meaning it will lubricate your engine parts quickly during a cold start. Conversely, in extremely hot temperatures, this motor oil has a lower trend to evaporate.

This motor oil offers clean pistons up to 50 percent and cleans up to 40 percent of engine sludge in the initial oil change. It also continues to clean on the second and subsequent changes by softly lifting sludge deposits off motor surfaces and safely dissolving them into the oil. Furthermore, the oil’s formula controls deposits and high-temperature oxidation while providing emission system protection.

The specifications, recommendations, and approvals of this oil include FCAMS-6395, Ford WSS-M2C946-B1, GM dexos1 Gen8 2, Chrysler MS-13340, Volvo, and Honda/Acura HTO-06. The motor oil exceeds the requirements of API SN-RC, APISN PLUS, and all preceding categories.


  • Helps in protecting engines from horsepower loss.
  • Offer great performance in extreme temperatures.
  • Offers wear protection from friction.
  • Provides oxidation stability.


  • Poor packaging.
  • Poor fuel economy improvement.

Factors to Consider When Purchasing the Best Motor Oil

1. Viscosity

Vehicles are given thickness and or consistency rating based on various factors, including operating temperatures, engine load, and external temperatures. Most diesel engines have a viscosity grade of 5W-40 and 15W-40, while gasoline engines are commonly rated 0W-20, 5W-20, and 5W-30. The numbers signify how resistant the engine oil is to thinning at high temperatures and thickening in low temperatures. The number before the letter W is the thickness when the oil is cold, whereas the base number is its thickness when the oil is at normal operating temperatures.

2. Additives

 When you are looking for the best synthetic oils, you will notice that they vary in the kind of additives they contain. Most come with anti-foaming agents, anti-wear agents, detergents, conditioners, corrosion inhibitors, antioxidants, and viscosity index improvers. Therefore, it is important to determine which of these additives is ideal with combination for your vehicle.

3. Compatibility

It doesn’t cause any harm to your engine if you top off your conventional oil with a little synthetic oil. Nonetheless, that will dilute the synthetic properties reducing the benefits. You must be conscious of your engine’s needs. Some older cars work great with conventional oil, while modern vehicles operate great with synthetic oil.

  1. Type of driving

If you love driving fast, regularly carrying heavy loads in your vehicle, or own a sports car, you need the oil designed specifically for these kinds of tasks or higher-quality motor oil. For instance, engines that go through more stress than an average vehicle will perform great with full synthetic oil.

5. Cost 

The cost of the motor oil is also a factor you should consider. The big win has a good motor oil that is fairly low in cost but still can run through your vehicle for as long as possible.

Frequently Asked Questions on the Best Motor oil.

1. Should I use synthetic engine oil on my car?

Yes, most engine oils are composed of additives and base oils. Synthetic oil contains more finely refined base oils compared to traditional mineral oils, providing performance and protection. Furthermore, synthetic car lubricants extend a host of benefits, which keep the motor running at enhanced performance for many years, such as keeping the engine clean, preventing wear, rust resistance, maintained viscosity, and reduced friction.

2. What is motor oil viscosity?

Thin lubricants come with low viscosity, and thick engine oil has high viscosity. When the temperature is cold, engine oil should flow slowly; when the temperature is hot, the oil will flow faster. Nonetheless, to lubricate an engine properly, the oil has to flow at a uniform are via a wide spectrum of temperatures. If you live in Serbia, for instance, and it is cold, the engine oil needs to be thin enough to lubricate all the important internal components the moment you ignite the car.

3. What is the purpose of an additive?

Most motor oils have additives added to boost the overall fluid performance. These additives help oils to endure extreme operating environments. According to auto experts, even the finest base oil cannot protect on its own against water dilution, wear particles, corrosion, and shearing forces. Concisely, additives offer good base oils the performance benefits, including prolonged drain intervals, intense-pressure performance, and multi-grade performance.

4. What differentiates semi-synthetic motor oils from fully synthetic motor oils?

Synthetic blend oils or semi-synthetic motor oils possess only a fraction of premium-performance fluids, while full synthetic motor oil carries 100 percent non-traditional, premium-performance fluids.

5. Can I mix different motor oils?

Yes, you can mix different engine oils. Engine oils are compatible with mineral oils, synthetic oils, and another synthetic blend. Nonetheless, it is important to keep in mind that this will compromise the premium performance of any motor oil by diluting it in any way.

6. Why change from regular oil to synthetic oil?

If you care about your car’s engine health, you will change from regular to synthetic oil. Eighty percent of the engine oil is made of base oils, while the remaining 20 percent contains additives. The chemically processed molecules in synthetic base oil contain more constant properties than the conventional base oil, which varies in shape and impurity.


Castrol (03084C) Edge advanced full synthetic is one of the best motor oils. This oil is made using a Fluid Titanium technology, which helps the oil transform its structure under pressure to keep metal apart while reducing friction for maximum motor performance. It is 10-times stronger against extremely high-temperature oil thickening and is 6-times stronger against wear when compared to the industry benchmark. Furthermore, it is ideal motor oil in both racing and street applications alike.

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