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Best Synthetic Oil Consumer Reports

Conventional and synthetic engine oils both came from the same crude oil base or other natural sources, such as oils extracted from plants.

As far as the similarities concerned, the fact that both kinds of engine oil came from a base or crude oil is the only common denominator between conventional and synthetic oils — the two kinds of motor oil used today.

The best synthetic oil consumer reports is made of factory refined crude oil packed with additives and formulations to improve engine efficiency. The notion that synthetic oil is ‘fake oil’ because it is called ‘synthetic’ is a misnomer. Top rated synthetic oil is distilled in modern refineries, breaking down its components into, basic molecules to avoid oxidation which shortens its potency.

Best Synthetic Oil Consumer Reports

1. Pennzoil Platinum 5W-30 Full Synthetic Motor Oil

The Pennzoil Platinum 5W-30 is a full synthetic oil with PurePlus® Technology, a patented trailblazing gas-to-liquid process, converting natural gas into a fully synthetic base oil, producing a very high-quality product that is a first of its kind.

Using natural gas as a base oil, which is free from impurities found in crude oil bases, Pennzoil enjoys a head start among many lines of conventional and other synthetic engine oils.

Clear, pure base oil mixed with high-performance additives makes the Pennzoil Platinum® with PurePlus® Technology a top synthetic oil designed to achieve a complete and uncompromising protection of your engine.

Pennzoil guarantees 30% cleaner pistons which are required by the highest and most meticulous industry standard, keeping engines cleaner than leading top synthetic oil brands in the market today.

The ingenuity of Pennzoil engineers in creating this outstanding lubricant from a natural gas base is laudable. While other chemical engineers are pre-occupied with advance research to distil crude oil (i.e., transform a liquid to a gas form and back) just to remove impurities, Pennzoil took seriously a clue from nature. Why do you need to distil a liquid crude oil when there is a natural gas? It makes a perfect sense, right?

Pennzoil Platinum 5W-30 full synthetic oil, which comes in a quart jug, has superior cleansing active agents to clean sludge better. It passes the highest stringent requirements of carmakers which it comes to engine protection and cleanliness. You can’t go wrong with Penzoil, one of the leading manufacturers of oil and lubricants today.

2. Royal Purple 5W-30 Synthetic Motor Oil

The Royal Purple synthetic motor oil under the HPS Series is highly recommended for vehicles whose manufacturer’s warranty already expired and owners seeking improved levels of engine performance and protection.

It is fortified with a high level of zinc and phosphorus additive to combat wear with an expertly formulated additive called the Royal Purple’s trademarked Synerlec® technology.

The Royal Purple’s top synthetic oil blend known as the HPS series outperforms other leading synthetic oils and traditional lubricants, be it for gasoline or diesel engines.

The HPS series is available in viscosities including 5W-20, 5W-30, 10W-30, 10W-40 and 20W-50. It could respond to higher pressure by increasing its viscosity.

With its exceptional high film strength, engine wear is dramatically reduced while dissipating engine heat, effectively extending your engine life. This formulation of best synthetic oil improves the sealing system in the piston ring and the cylinder wall.

Royal Purple synthetic oil guarantees you optimized horsepower and maximum torque, thereby achieving better fuel economy.

Formulated with oxidation stability in mind, this synthetic oil gives you more mileage before changing oil, allowing you to save more time and money, and reducing the demand for used oil disposal that impacts on the environment.

The Royal Purple also cleans your engine with the advanced solvency of this synthetic oil. It considered the protection of valve trains that use rollers or flat tappet lifter against high lift and high ramp rate camshafts. For vehicles that are still under warranty, Royal Purple endorses the use of API-licensed oils available at retailers in the country.

3. Mobil 1 Synthetic 5W-30 Motor Oil

This product from Mobil is manufactured in the USA. It takes pride of its easy-to-use tag. It is advanced full synthetic oil formulated to prevent sludge and deposits build-up in your engine, effectively prolonging its life. Mobil 1 provides excellent lubrication of your entire engine, preventing wear caused by many challenging driving styles.

The Mobil 1 synthetic oil boasts of its ‘Outstanding Thermal and Oxidation Stability’ which allows optimum change oil intervals recommended in the vehicle owner’s manual. Mobil 1 synthetic oil has enhanced its friction-reduction properties, thus, aiding in fuel economy and excellent reduction of temperature. It allows your engine to quickly start even in the cold weather with snow on the ground.

This best synthetic motor oil flows better in low temperatures, even as when the car sits overnight and the oil settles on the bottom level of the crankcase. When the ignition is fired up, Mobil 1 begins flowing through the critical parts of the engine that needs protection from friction.

In cold winter periods, or in an extremely cold area, the flow of oil may take a longer process. Mobil 1 engineered its motor oils to quickly flow even when the temperature is critically low, therefore, it starts protecting the engine as the car starts. When engines are really running hot, conventional motor oils break down and could evaporate, exposing the engine to wear and tear.

Mobil 1 motor oils, even as they work excellently in very cold conditions, are also formulated to withstand high temperatures which you will commonly experience when driving in arid places with hot climates.

4. Shell Rotella T6 5W-40 Full Synthetic Diesel Oil

With the new ROTELLA®, Shell proudly announced a dramatic change in their portfolio of hardworking heavy duty diesel engine oils. Aiming to create the most ‘technically advanced’ formulation, Shell ROTELLA® has clearly organized its portfolio for you to easily identify which oil is best for your engine.

Shell Rotella T6 is a heavy duty full synthetic oil featuring Shell’s advanced technology multi-functional, a low-ash additive formula designed to protect the engine in various driving conditions. The formula aimed at reducing ash, phosphorous and sulfur emissions that are sometimes very hard to pass as clean air regulators became stricter over the years.

Shell Rotella T6 5W-40 allows excellent oil flow even at -30 degrees Fahrenheit low-temperature. Compared to leading brands among the competitive API CJ-45W-40 products, the Rotella T6 guarantees the best protection against shear-stability degradation.

Shell packaged the Rotella T6 in a new, harder working bottle and label that comes in 1-Gallon jug pack, 6 x 1-Quart jug pack, 3 x 1-Gallon jug pack, featuring the following highlights:

  • Simpler graphics to spot, grab and go
  • Improved cap design for easier opening
  • Thinner bottle for easier shelf storage
  • Two handle design for easier carrying
  • Improved pouring capability through synthetic oil comparison
  • Easier to read label
  • best brand of synthetic oil

The Rotella’s new package design that aims to help make your hard work easier:

  • Easier to spot on shelf
  • Easier to store
  • Easier to carry
  • Easier to pour
  • Easier to open

Shell holds on its reputation as top synthetic oil brands supplier of the world, delivering high-quality lubricants to motor vehicle users in over 100 countries.

5. Castrol EDGE 5W-30 Synthetic Motor Oil

This 5-quart Gold-bottled pack of top synthetic oil gives your engine extended performance and strength to run 15,000 miles before change-oil. The EDGE gives you muscle power to maintain stable viscosity while your engine battles extreme friction force. Your engine stays protected with its trademarked ‘Titanium additive’ for unsurpassed protection.

Castrol Edge 5W-30 meets performance standards of General Motors Dexos1, Chrysler MS 6395, For WSS-M2C929, For WSS-M2C946-A, and Honda HTO-06. The EDGE exceeds ILSAC GF-5, API SN, ACEA A1/A5, and ACEA B1/B5 requirements.

Today’s modern designs backed by technology advancement made engines smaller but packed with more power and efficiency. Demand for improved fuel economy, reduced carbon dioxide and harmful gas emissions and better performance made engine designers look for more reliable oils.

Modern engines produce 10 tons/cm2 pressures, just like the weight of 5 cars resting on a small space comparable to the space occupied by a high-heeled shoe. Higher pressure equals more stress in your engine oil.

Friction from metal-to-metal interaction in smaller engines reduce its performance, and that is best addressed by top rated synthetic oil like the Castrol Edge 5W-30.

A proud Toyota owner, Herbert Thompson, who owns a 2002 pick-up truck and 1998 Camry, said he used Castrol’s best synthetic oil only.

The British brand Castrol is associated with ‘castor oil’ which is derived from a plant producing the oil, scientifically known as the Ricinuscommunis. It is known for its wide use as an anti-constipation agent across the world. If it even works as a lubricant in the human body, it must be perfect for engines too!

Synthetic Oil Buying Guide

What is the best synthetic oil consumer reports?

pour synthetic oil

Synthetic motor oils are developed in a laboratory environment by researchers and engineers using blends of processed base oils and chemical additives designed to improve engine performance. These formulations sought to address technical issues involved in engine lubrication, from start-up to full running status.

More advanced synthetic oils provide engines with [a] anti-heat build-up protection, [b] optimum friction reduction inside the crankcase to prolong engine life, and [c] cleaning ability to neutralize dirt and deposit build-up.

When buying synthetic oil brands, you must be familiar with some of the technical features of your car’s engine. If you are using an old car, there is an appropriate type and brand for you, so you will not spend for products that are over-rated when matched to your needs.

What is Conventional Oil and its Limitations?

Older models of vehicles that are used in routine low-mileage travel activities such as commuting, messenger errands, vacation trips and other common trips often use conventional motor oil.

Later models of vehicles, which are designed for more tedious high-mileage travels and sports races, used highly specialized synthetic motor oils.

Conventional or regular oils showed problematic properties in many aspects because of its molecular composition vary in size and shape, making it prone to oxidation that wears out the oil, reducing its potency in preventing friction in moving engine parts. The formation of sludge reduces engine efficiency and longevity of its life.

man holding gallon of oil

Types of Motor Oil

  • Synthetic blend motor oil – This is made for engines carrying heavy loads regularly, engines operating at high RPMs every day and trailers used in towing. Synthetic blends possess the best oil property to cope with low temperature and to combat oxidation common in older conventional engine oils.
  • High mileage motor oil – According to synthetic motor oil reviews, this motor oil is specially formulated for vehicles with 75,000 or more miles used up in travels. The best kinds of high-mileage engine oils use advanced additives that help stop oil leaks in aging seals, helps reduce burn-off, and helps restore engine compression.

Consult a mechanic before filling-up with high-mileage engine oil. Some older vehicle engines models work best with common synthetic oil.

What are Motor Oil Ratings?

Synthetic oil ratings determine the kind of oil fitted for the requirements of your vehicle’s engine. When you want to know “Who makes the best synthetic oil?” this is the answer you are looking for.

The multiviscosity types of engine oil today are labeled with a designation of the oil’s performance at certain levels of temperature. A 5W-30 label means that it flows better at colder temperature compared to a 10W-30 labeled oil rating.

The number before the ‘W’ denotes the viscosity rating when the oil functions at cold temperature or at engine start-up. The letter ‘W’ stands for winter. The number after the ‘W’ shows the oil’s performance level at high temperatures.

Using and Safety Tips

Ask a certified mechanic what is the best synthetic motor oil when it comes to the oil viscosity level fitted for your car and your climate. Using the wrong oil rating may damage your engine, or shorten its life without you noticing it.

mechanic pouring synthetic oil

Usually, the properties of the engine oil have something to do with the price. The lower temperature or the higher the temperature that the motor oil can withstand, the more expensive it becomes, in most cases.

The Advantages of Synthetic Oil

Minus the impurities, the best synthetic oil should keep your engine clean and keep it cleaner with the aid of formulated additives. When top rated synthetic oil circulates inside the engine, the special additives picks up dirt and impurity deposits.

The best brands of synthetic oil contain only a minimal amount of impurities from its original crude oil form. It could resist better sludge formation preventing unwanted deposits accumulating in the engine.

The early formulation of synthetics had a bad reputation for leaking. The swelling of seals in crankshafts and rocker cover has been noted. Things get worse when owners change back to mineral oil, or when it adds some oil to the engine when no synthetic is available.

The seal of valve covers compress when swelled, and when different oil is added, leaks take place.

The best fully synthetic oil sold today now allows shifting of use between mineral and synthetic oils in the same engine. Adding a quart of conventional oil to an engine crankcase filled with synthetic oil is just fine. In fact, some synthetic oil brands in the market are formulated blends with a substantial mix of refined conventional mineral oil.

A partnership between MIT and Infinium have examined specific areas related to a future synthetic oil magic formula which is hinged on a major strategic advance in lubricant-rheology. They looked at several factors to reduce mechanical losses, such as:

  • The benefits of using low viscosity oils
  • Testing of advanced synthetic engine lubricant and engine lubrication system concepts
  • Theoretically building a model of the friction of lubricated components in the power cylinder, valve train, and crankcase
  • On-site control of lubricant properties

Reduction of Engine Friction

Tremendous research and development efforts were exerted in many years to reduce engine friction. Design factors looked upon by engineers include engine component, component materials, and surface characteristics of moving parts. Most importantly, all further improvements inside the engine will eventually shape the formula of future synthetic engine oils, says Victor Wong of MIT.

mechanic checking oil engine

Actively Reducing Mechanical Losses

Wong said the centrepiece of their pioneering research at MIT from 2002-2007 is focused on measures to reduce mechanical losses. Some of these measures are shown by the advancements in lubricants, surface characteristics of engine components, and component designs.

The Department of Energy of the United States is funding a lubricant formulation program along these lines of research.


The best synthetic oil remains tied to improving engine efficiency. Unlike in the past decades, wherein the automotive industry aimed to build bigger, faster and more powerful engines for our vehicles, today’s consumers, governments, and industries shifted their attention to increased engine efficiency and reduced emissions.

But generally, the future of synthetic motor oil remains to be focused on reducing friction inside the engine’s crankcase.

Until now, only a few lubricant properties were examined. In moving forward, more design variables will be evaluated by scientist all over the world in relevant test engines.

These might include different viscosity modifier polymers and oil base stocks. In the quest for the best synthetic oil, Dr. Wong believes there must be a balance between fuel economy development and improvements in wear protection.

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