Buying Guide: Find the Best Synthetic Oil

Picking the best synthetic oil for your vehicle is essential to the long, healthy lifespan of your engine. Without oil in your vehicle, you won’t be getting far at all. The purpose is to lubricate the engine and its parts. It’s supposed to do without leaving a large deposit of residue on the engine. The advantage of using oils is to resists oxidation. It helps eliminate engine sludge problems, requires less frequent changes. And can hold for up to 7,000 miles (some of the ones on our list can last even longer).

The best synthetic oil also allows your car engine to function smoothly in extreme weather conditions. When buying oil, you need to make sure you are buying the right kind. And for the circumstances, the vehicle will be running under.

Disclosure: We receive compensation from the companies whose products we review. We are independently owned and the opinions expressed here are our own.

Below we’ve compiled a list of the best synthetic oil or oils of 2018. Enjoy!

The best synthetic oil featured on the list were rated based on quality, viscosity, customer reviews, and the overall functionality. We considered the popularity of the blogs as a proof of their authenticity and authority.

We always rate the products honestly based on our experience. And strive for accuracy by verifying the sources we use for the examples that we choose to use.

The 10 Best Synthetic Oils Comparison Table


Product

Image

Details

Our Rating

Price

AMSOIL Signature Series Synthetic Oil

AMSOIL Signature Series Best Synthetic Oil

It has anti-wear additives

Pennzoil Ultra Platinum Full Synthetic Motor Oil

 Pennzoil Ultra Platinum Full Synthetic Motor Oil

It utilizes a patented PurePlus technology

Mobil 1 Extended Performance Synthetic Motor Oil

Mobil 1 Extended Performance Synthetic Motor Oil

SuperSyn Technology is the reason behind the longevity of the oil

Royal Purple High-Performance Synthetic Motor Oil

Royal Purple High-Performance Synthetic Motor Oil

Recommended for high-performance vehicles

Castrol EDGE Full Synthetic Motor Oil

Castrol EDGE Full Synthetic Motor Oil

It helps to support engines under high stress environments

Valvoline MaxLife High Mileage Motor Oil

Valvoline MaxLife High Mileage Motor Oil

It makes your old car feel young again

Liqui Moly Premium Synthetic Motor Oil

Liqui Moly Premium Synthetic Motor Oil

For lengthening the life of your engine

Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil

Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil

It's a multi-functional dispersant additives that help protect your bike’s engine

Lucas Oil Synthetic High Performance Motor Oil

Lucas Oil Synthetic High Performance Motor Oil

A true racing oil in that it can outlast other oils by up to 4 times

Red Line Synthetic Oil

Red Line Synthetic Oil

The oil that can withstand the high pressure and extreme environments present in a high-performance vehicle

Here's Our Full Review of The 10 Best Synthetic Oils For 2018


1. AMSOIL Signature Series Synthetic Oil

AMSOIL Signature Series Best Synthetic Oil

The AMSOIL Signature Series Synthetic Oil is considered the best synthetic oil on the market today. The oil is said to do the best job of protecting your car from wear and damage. It’s difficult for a brand in synthetic oil to obtain that level of notoriety. Because the oil excels in one area, it falters in another.

Anti-wear Additives

The AMSOIL Signature Series Synthetic Oil has anti-wear additives that far outstrip the other leading brands of synthetic oil regarding engine protection. This translates to stable viscosity in extreme weather, the convenience of waiting longer between oil changes, and exceptional fuel economy.

With AMSOIL Signature Series Synthetic Oil you’ll get between 15,000 to 25,000 miles. This number alone should be enough to make you rethink your choice in synthetic oil. The downside is that the oil is only available on the AMSOIL website with a premium price for this premium oil.

If you can invest in this oil, trust us, it won’t disappoint. As one of the best synthetic oil on the market, this oil gets a perfect score.

Pros

  • It has anti-wear additives
  • You’ll get between 15,000 to 25,000 miles
  • To stable viscosity in extreme weather

Cons

  • A little pricey

Quality

Price

Our Rating

High

$$$


2. Pennzoil Ultra Platinum Full Synthetic Motor Oil

 Pennzoil Ultra Platinum Full Synthetic Motor Oil

The Pennzoil Ultra Platinum Full Synthetic Motor Oil utilizes a patented PurePlus technology to produce a synthetic oil renowned for its cleaning abilities and great lubrication. The PurePlus technology uses pure natural gas and converts it into a full synthetic motor oil.

The result is a 99.5% pure base oil whose purity acts to enhance the abilities of the additives that are added to the pure base oil. Use of this synthetic oil results in better fuel economy, premium protection from friction, and nominal energy loss.

Pennzoil is so confident in its oil that they even offer a warranty of 500,000 or 15 years if you exclusively use their products. That is a generous warranty indeed.

Their rating was set based on their commitment to detail and a product whose cleaning abilities always exceed industry standards.

Pros

  • Formulated with PurePlus Technology
  • Better viscosity control
  • Helps protect engines from loss of power

Cons

  • Achieved even under severe oxidative test conditions

Quality

Price

Our Rating

Best Oil

$$


3. Mobil 1 Extended Performance Synthetic Motor Oil

Mobil 1 Extended Performance Synthetic Motor Oil

The Mobil 1 Extended Performance Synthetic Motor Oil is by far the most trusted and popular synthetic oils. The Mobil name has over 100 years of history and is used by more car manufacturers and NASCAR teams than its competitors.

The main focus of the Mobil 1 Extended Performance Synthetic Motor Oil is to have as much time as possible between oil changes. The mileage between changes can be as high as 23,000 miles. Its SuperSyn Technology is the reason behind the longevity of the oil. The technology helps keep the additives functioning at optimum in extreme temperatures.

If you need a synthetic oil that is long-lasting, reasonably priced and works well in extreme temperatures, you can’t go wrong with this Mobil products. It hails as the best synthetic oil in terms of being a well-respected and trusted brand.

Pros

  • Enable long engine life
  • Excellent overall lubrication and wear protection performance
  • Exceptional control of oil breakdown

Cons

  • Recommended only when you go over 7500 miles

Quality

Price

Our Rating

Great Oil

$$


4. Royal Purple High-Performance Synthetic Motor Oil

Royal Purple High-Performance Synthetic Motor Oil

The Royal Purple High-Performance Synthetic Motor Oil is the best synthetic oil recommended for high-performance vehicles. When speaking about auto-care, Royal Purple has developed a trusted brand among car enthusiasts.

Other synthetic oils have trouble stabilizing the engine during extreme conditions, such as high speeds, high temperature, and increased load. Royal Purple High-Performance Synthetic Oil is Royal Purple’s solution to this problem. This synthetic oil helps prevent engine degradation and reduced fuel economy in extreme conditions.

Its compatibility with other oils means you can start using this oil right away without draining the remaining oil.

It’s the best synthetic oil for those who use high-performance vehicles or live under harsh weather conditions.

Pros

  • Better wear protection
  • Increased fuel efficiency
  • Superior corrosion protection

Cons

  • Compatibility with fuels containing ethanol

Quality

Price

Our Rating

High-Performance

$$


5. Castrol EDGE Full Synthetic Motor Oil

Castrol EDGE Full Synthetic Motor Oil

The Castrol EDGE Full Synthetic Motor Oil is similar to Royal Purple’s High Performance Synthetic Motor Oil in that it helps to support engines under high stress environments. Castrol EDGE has triple the viscosity breakdown of other leading synthetic oil brands.

The titanium technology protects the effectiveness of the motor oil under higher temperatures and increased friction. The Castrol EDGE also has a high mileage between changes, maxing out at about 15,000 miles before you need another oil change.

In addition to all of the above, it does a fantastic job keeping your engine clean. The Castrol Edge is reasonably priced and this British company has established itself as a favorite among its competition.

Pros

  • Advanced premium full synthetic motor oil
  • Reduces metal-to-metal contact
  • Decreases engine deposit formation

Cons

  • Not A5/B5 according to container

Quality

Price

Our Rating

High-Quality Oil

$


6. Valvoline MaxLife High Mileage Motor Oil

Valvoline MaxLife High Mileage Motor Oil

Have an older car you want to make like new?

The Valvoline MaxLife High Mileage Motor Oil makes your old car feel young again. The MaxLife has a special formula of ingredients specifically designed to extend the life of your aging vehicle.

Some of these ingredients include the incorporation of additional detergents to maintain a strong, clean engine, additional wear prevention components to prevent future wear, and anti-oxidants that prevent the oil from breaking down.

The Valvoline MaxLife High Mileage Motor Oil is meant to be used when a car has reached over 75,000 miles. It specifically targets four main areas – sludge, friction, deposits, and leaks – essentially, all the areas an older car would need help handling.

If you have an older car that needs a boost, this is the best synthetic oil. One perk of this oil is that it’s relatively inexpensive.

Pros

  • Seal conditioners rejuvenate aging engine seals
  • Extra wear protection
  • Anti-oxidants help prevent oil breakdown

Cons

  • Not to be used on older cars

Quality

Price

Our Rating

Great Oil

$$


7. Liqui Moly Premium Synthetic Motor Oil

Liqui Moly Premium Synthetic Motor Oil

The Liqui Moly Premium Synthetic Motor Oil is the best synthetic oil for lengthening the life of your engine. It’s the fountain of youth for cars. Well, maybe not, but it does do an excellent job at lubrication.

The Lipui Moly Premium Synthetic Motor Oil focuses on providing excellent lubrication and improving the car’s fuel economy.

In 1957, this German company incorporated the additive form of molybdenum disulphide (MoS2), which increases lubrication of the engine by smoothening the metal frictions points. This therefore adds to the longevity of your engine.

This synthetic oil is compatible with various engines. Also, it's measured in liters, so 5 liters gets you 5.28 quarts -- a little more for what you'd normally pay.

Pros

  • High lubrication reliability 
  • High level of protection against wear
  • Saves fuel and reduces pollutant emission

Cons

  • Ideally suited for modern gasoline and diesel engines

Quality

Price

Our Rating

Best Oil

$$


8. Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil

Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil

The Shell Rotella T6 Full Synthetic Heavy Duty Engine Oil is a synthetic oil which motorcyclists everywhere rave about. The synthetic oil performs well in extreme temperatures and Shell has designed the oil to maximize on any metric it can.

This includes a low ash additive that helps to maintain the fuel efficiency of the bike, while lowering emissions. There are other advanced additives, called multi-functional dispersant additives that help protect your bike’s engine from dirt, soot, debris and other would-be contaminants.

This is the best synthetic oil for motorcycle lovers. it looks pricey at first glance, but this is container holds 2.5 gallons while the others are measured in quarts.

Pros

  • Improved wear performance
  • Improved deposit control
  • Emissions system compatibility

Cons

  • Designed mainly for motorcycles

Quality

Price

Our Rating

Average

$


9. Lucas Oil Synthetic High Performance Motor Oil

Lucas Oil Synthetic High Performance Motor Oil

To be fair, we need to have more than one addition here for motorcyclists. Here’s what Your Best Picks had to say.

“Lucas Oil is a household name when it comes to the oil of choice for ET racing. They’ve had over 100 years to perfect their high performance motor oil blend, and the results show.

This is a true racing oil in that it can outlast other oils by up to 4 times. Third party tests reveal an extremely good ability at maintaining form when exposed to extreme temperatures like that experienced in a racing environment.

A poorer quality oil will produce deposits leading to less efficiency and poor performance. Not Lucas Oil though – this lubricant will keep your engine parts moving effortlessly with minimal wear as well. We can thank the exclusive lubricity and anti-seize additives that protect the metal components in your engine.”

Pros

  • Full Synthetic Formula
  • 4T motorcycle oil with moly is designed for non-wet applications
  • Helps to lower oil temperatures

Cons

  • Not for use with a wet clutch

Quality

Price

Our Rating

Great Performance

$$$


10. Red Line Synthetic Oil

Red Line Synthetic Oil

The Red Line Synthetic Oil is another synthetic oil that can withstand the high pressure and extreme environments present in a high-performance vehicle. The synthetic oil’s special sauce is a polyol base stock that can take the heat of a modern jet engine.

This caution seems unnecessary. But this ensures that the synthetic oil will perform under the conditions in a high performing engine since your car’s engine will never exude the power of a jet engine.

The Red Line Synthetic Oil is regularly used among car racers and motorcycle racers. This is the best synthetic oil if you know you have an engine you expect to run hot and heavy.

Pros

  • Allows for faster shifting
  • Makes the transmission synchronizers come to equal speeds more quickly
  • Can also be used in racing limited-slip differentials

Cons

  • Expensive if you're not a car or motorcycle racer

Quality

Price

Our Rating

Excellent Performance

$$$$


Buyers Guide – What to Consider When Buying Synthetic Oil

Most synthetic oils are going to be solid at providing your engine with its basic needs, such as good lubrication and additives that will keep your engine clean. The differences should come into consideration in terms of your engine’s unique needs and circumstances.

For example, do you have an older engine? Then Valvoline MaxLife High Mileage Motor Oil while gives your engine a facelift.

Are you going to be racing your vehicle? Then look no further than high-performance synthetic oils like Royal Purple High-Performance Synthetic Motor Oil or Redline Synthetic Oil.

Also, the type of vehicle will affect your choices. You might not use the same oil for your day-to-day vehicle that you would for a truck or motorcycle.

With this guide, you’ll be able to get a head start on getting the best synthetic oil for your needs.

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