10 Best Conventional Motor Oil Consumer Reports

Best conventional motor oil plays a big role in improving your old or new vehicle engine performance, better mileage, cleaning power, and protection.

Although many people use the best conventional oil in cold weather for quick engine start-up and not overheating, synthetic oil is currently built with a lot of advanced formula, so you get a lot more advanced features for your vehicle, which has many more benefits, including increasing your vehicle engine life.

The synthetic oil engine lubricant is made with artificial chemical compounds through research in the laboratory environment, which cleans the dirt accumulated in the engine in an advanced way and also builds up an anti-heat shield.

Our Top Picks: Best Synthetic Oil Consumer Reports

What Are The Advantages of Synthetic Oil?

I think you already know something about synthetic oil benefits; it keeps your engine clean as well as removes impurities, and improves the engine’s efficiency.

The automotive industry is also getting big day by day and is building powerful and faster engines in new vehicles. In this case, regular machine oils are not giving much performance in updated engines, so most of the owners are getting effective in using synthetic oil.

Synthetic oil is also used in most of the fields to improve the performance and mileage of older vehicles. And there are many more great features.

Best Conventional Motor Oil Consumer Reports

After researching dozens of products, our specialist has found the top 5 conventional motor oil. Also made the best conventional motor oil consumer reports with a complete guide and presented the full features and benefits of each oil, Which will help you choose the right products. Also, it will help you to know which one is perfect for your vehicle.

However, before starting our trip with conventional oil reviews, we recommend you view our comparison table that will help you get a slight idea about these five oils. This table will also help you to know about the difference between these conventional oils and understand which model will suit your vehicles.

Best Conventional Motor Oil Review

1. Castrol 03057 GTX Magnetic Full Synthetic Motor Oil

Castrol is one of the most popular brands in the synthetic motor oil industry. The biggest advantage of the Castrol synthetic oil brand is that they make oil maintaining the demand and quality of their huge customer base. Castrol’s most famous conventional motor oil is the Castrol 03057 GTX Magnetic series.


There are many benefits to using it, and the best part is that it is suitable for most of the vehicle’s engine. And as a result of using it, the vehicle’s engine has a much cooler performance; besides, it is suitable for running in any weather. Especially in cold weather with smooth performance.

Engine Performance

Castrol is the most advanced level of synthetic engine oil; another of the best aspects is that if your car engine has any critical issues, it has superior protection. It also reduces engine wear for better performance of the engine with better draining performance.

Overall Impression

Overall consider Castrol 03057 GTX Magnetic synthetic engine oil an excellent pick for most of the vehicle’s engine. It can travel up to 6000 miles effortlessly once switched. Also, we are pretty sure you will not be disappointed with this Castrol oil series.


  • Trusted and leading brand in vehicle lubrication
  • Engine runs cooler in any weather
  • Protect your engine from wear
  • Excellent matching usages


  • Lack of anti sludge properties

2. Valvoline Advanced Full Synthetic Motor Oil

Valvoline advanced full synthetic motor oil is one of the popular series of Valvoline brands. There are many advantages to using it for the engine. Especially its extra detergent formula helps a lot to fight with deposits and sludge. The engine also has the features of ultimate protection.


One of the great advantages of Valvoline engine oil is that it has been developed with an advanced level protection formula for various vehicle engines, including hard working trucks, cars, and SUVs. In addition, after using this conventional oil for a long time, your vehicle engine is running so quietly; it also allows it to run in a cool and smooth way. There are also many other advantages.

Engine Performance

Another unique advantage of Valvoline motor oil is that it has 50% more wear protection than industry standards. Its superior engine protection also protects your engine by fighting the three major engines causing heat, wear, and deposits.

It also protects your engine from temperature and helps you drive smoothly, even if you drive in hot or cold weather conditions. And for most of the vehicle’s engine, using it gives a lot of accurate results.

Overall Impression

If you are looking for conventional oil for your heavy-duty vehicle’s engine, then I would highly recommend this series of Valvoline Advanced Full Synthetic Motor Oil. Also, if you consider the overall Valvoline Advanced Full Conventional Motor Oil is a perfect choice for smooth running and protection of any engine.


  • 50% more protection than industry standards
  • Great for heavy-duty vehicles
  • Faster oil flow at startup
  • Weather protection


  • The oil smells a lot like burnt oil

3. AmazonBasics Full Synthetic Motor Oil

Another trusted brand in the automotive industry is AmazonBasics, which is currently the most popular brand for its quality products. If you are looking for the best conventional oil in budgets, then I would highly recommend AmazonBasics full synthetic motor oil. Its many advanced level features have attracted us a lot.


The best advantage of the AmazonBasics synthetic motor oil is that it will help your vehicle engine reduce exhaust emissions. It has also been formulated with longer drain intervals. Besides, once used, it gives your vehicle engine a high level of engine protection for a long time.

Engine Performance

Due to the long-term use of the engine’s fuel economy is gradually reduced, there are many owners who are not satisfied with the fuel economy. The excellent news for them here is that the AmazonBasics motor oil will help you a lot to improve your vehicle engine’s fuel economy and help reduce frictions.

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In addition, it provides good protection from the heat and wears causes of the vehicle engine. It also protects against problems like corrosion and rust.

Overall Impression

One of the great advantages of AmazonBasics full conventional motor oil is that it protects your engine in any weather. Your engine has a much smoother performance after use. It is also one of the best picks in the budget.


  • Protects your engine in any weather
  • Shields against corrosion and rust
  • Reduce exhaust emissions
  • Budgets friendly


  • Do not use in Turbo GDI engine

4. Shell Rotella T6 Full Synthetic Diesel Engine Oil

The Shell Rotella T6 is another heavy-duty engine oil pick. It is the most advanced technology of synthetic diesel engine oil, which gives heavy-duty engine advance level protection. Its high-quality lubricants are beneficial to increase the performance of your vehicle’s engine.


For those who are looking for diesel engine oil, Shell Rotella T6 is a perfect choice for them. One of the great advantages of using it is that additive technology has been used to make this engine oil; that’s why it protects your vehicle engine from impacts like dirt, soot.

Also, another great aspect of it is that it improves fuel economy by 1.5% more than SAE 15W-40 oils. It is also highly compatible with exhaust control systems.

Engine Performance

It performs exceptionally well at any temperature, as well as the engine’s durability is intact as a result of its use. And the life of the engine increases. The advanced low ash formulation of Shell Rotella T6 is extremely helpful in maintaining blocking poisoning of exhaust and diesel engine fuel efficiency. Also, once you use it, your vehicle engine will run smoothly 5000 to 6000 miles effortlessly.

Overall Impression

The Shell Rotella T6 fits with the maximum engine, which makes it much safer to use. It also maintains the optimal pressure of the heavy-duty diesel engine. As it is heat resistant, the temperature is under control even after running the engine for a long time.


  • Made with advanced technology
  • Great synthetic diesel engine for heavy-duty vehicles
  • Protects against dirt, soot, and other contaminants
  • It improves the fuel economy


  • Bad Packaging Issue

5. Pennzoil 550046127 Platinum Full Conventional Motor Oil

Introducing the Pennzoil 550046127 platinum full conventional motor oil, which is another excellent conventional motor oil for your vehicle engine. It is specially made with the help of natural gas and PurePlus technology, which makes it much safer to use in any type of vehicle engine.


One of the best advantages of using Pennzoil conventional motor oil is that it keeps the pistons clean by 45%. It also gives the engine a smooth performance when the engine is very clean. It improves the fuel economy a lot more than before, due to which it has a lot of excellent performance.

Engine Performance

Most of the synthetic oils are made with crude oil, but Pennzoil is made with natural gas, which gives it a different kind of advanced level engine performance. It also provides better wear protection to the engine than other motor oils. It protects the vehicle engine from overheating Also keeps it protected at all times.

Overall Impression

Pennzoil Platinum conventional motor oil is made from natural gas and is much safer than other regular synthetic oils. It also attracts a lot of other advantages, durability, and performance, including protection from problems like extreme temperature performance, wear, and deposits.

That’s why overall, it is another most suitable pick for any vehicle.


  • It is made with Natural gas and PurePlus technology
  • Great for use any type of vehicle engine
  • Keeps pistons up to 45% cleaner
  • Protects from temperature, wears, and deposits


  • Need to improve its packaging issue

6. Lucas Oil Petroleum Oil 10W-30

Searching for the best conventional motor oil for classic cars? I think you should see this oil once. This traditional oil is already very popular with local consumers and highly preferred by everyone for its excellent thermal stability and great high-performance features in overheating conditions.

Higher Engine Performance

This conventional oil is perfect for cold weather conditions. In particular, your startup protects your engine. As well as in the summer season, it is too thin. You may be happy to know that this oil reduces the old engine’s oil consumption and provides better fuel economy. So, according to consumers, this is an excellent option for the old engine.


Another specialty of Lucas conventional oil is its variety of SAE availability. You may have to choose conventional oil of different standards considering different conditions. Basically, keeping all these aspects in mind, the company has come up with SAE 10W-30, SAE 10W-40, and SAE 20W-50 oils so that you can select suitable oil from Lucas for any weather condition.


The Lucas contains special additives that protect against rust and corrosion, even if you are not using it for a long time. As well as being a high-performance lubricant, it provides long-lasting performance as well as protection of the engine.


  • Provide excellent thermal stability
  • Improve the pressure of worn engines
  • It contains a higher level of ZDDP (Zinc)
  • Protect against rust, corrosion
  • Lower oil temperature, minimize the metal fatigue
  • Higher performance lubricant, which provides long-lasting performance.


  • We didn’t find any critical issues.

7. Formula Shell Conventional Motor Oil 10W-40

If you are looking for good conventional engine oil for protection from extremely high temperatures, then the Formula Shell conventional oil may be another ideal option for you. Which reduces friction and provides a great defense to the engine; it also has many more features, which we are described below.

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Weather Protection

Formula Shell’s 10W-40 is great conventional motor oil for both summer and winter. This motor oil plays a great role in your engine cleaning and protection, especially if you live in Canada or the USA.

Improve Fuel Economy

According to consumers, this motor oil works perfectly for diesel engines, especially as a result of its use; the fuel economy has increased a lot compared to the past. Many also use this oil as an alternative to leakage or burring issues engines. After using this oil, it will shield your engine against acids, poisonous deposits, and other things, as well as always keep clean.


If you look at the price range, you can see that you are getting this oil much more in the affordable price range than outside the market and other standard conventional motor oil. Its protection and cleaning performance are excellent, which is why most experts think that you should use Formula Shell motor oil at least once in the life cycle of your engine.


  • Comes with an affordable price range
  • Improve fuel economy than before
  • Provide good weather protection, especially extreme temperature
  • Protect against harmful deposits and keep the engine clean
  • Good conventional motor oil for modern engine


  • Need to improve the packaging

8. Quaker State Motor Oil 5W-30

Quaker State is currently very popular for old and new engine vehicles, but it is called best conventional high mileage oil. It provides optimal oil film protection and also fights against engine sludge and deposits.


One of the best advantages of this is that it is made by maintaining all the specifications, due to which the engine wear is reduced as well as provides durable wear protection. It also provides corrosion protection against harmful acids generated from most engine contaminants.

Powerful Performance

Another great aspect of Quaker State motor oil is its powerful performance; basically, it provides robust performance after protecting and cleaning the engine from various obstacles. In North American conditions, it offers excellent performance also in any situation, and it can offer better performance along with protection of the engine.


Like our previous selection, this conventional motor oil also comes with a very affordable price range. As well as considering the performance and other features it is the best motor oil selection for almost any vehicle.


  • Comes with an affordable price range
  • Specially designed for protecting against corrosion
  • Improve the fuel economy
  • Also, this motor oil meets the standards of the GF-5 industry
  • Good selection for North American vehicles


  • This is conventional oil, not synthetic oil

9. HAVOLINE Conventional 10W-40 Motor Oil

HAVOLINE is another great motor oil option designed to protect your vehicle’s engine against acids and harmful deposits. It also helps to keep the engine clean for a long time and provides outstanding performance as our other selection.


HAVOLINE is one of my favorite conventional motor oils, which is very popular for its Deposit Shield Technology. One of the special features of Deposit Shield is that it fights against sludge and deposit formation, as a result of which the new and old vehicle’s engine’s critical parts get wear protection.

Engine Performance

HAVOLINE conventional oil is also much appreciated in the field of engine performance improvements. It provides protection against thermal breakdown as well as cleaning the crankcase ventilation system. Also, the heat temperature of the engine is controlled more efficiently than before. This oil is excellent for both new and higher mileage vehicles.

Overall Impression

Unlike regular motor oils, this classic motor oil has no obligation. That means you can use it on powerboats, cars, trucks, motorcycles or any vehicle. However, the manufacturer recommends conferring your owner’s manual concerning viscosity grade before using this oil. Because if you do not use the correct grade, you may not get proper performance.


  • Provide good anti-wear protection
  • Efficiently clean the critical engine’s parts
  • Excellently control the higher temperature
  • Meets the car warranty requirements
  • Protect against thermal breakdown
  • Suitable for use new and higher mileage vehicles


  • Need to improve the packaging issues

10. STP Conventional 5W-30 Motor Oil

Though STP motor oil is not as popular as Valvoline or Pennzoil, but according to consumers, it is still an incredible and affordable conventional motor oil option for any engine. One of its specialties is that it comes with several convenient bottles for portability to carry anywhere, as well as furnish efficient engine cleaning performance.


One of its advantages is that it is suitable for any weather conditions. In most cases, especially in cold seasonal countries, owners face a lot of hassles to start the vehicle engine. However, it’s time to say goodbye to the engine starting hassles because STP classic motor oil is suitable for both cold and hot weather conditions.

Engine Performance

It has been specially prepared to protect the engine from wear and other damaging effects. It also maintains fuel economy by reducing engine wear. You can find here a variety of grade motor oil depending on your vehicles’ needs.


Though most standard conventional motor oils give a considerable performance, you have to change these oils every few days, which many think to be a hassle. However, according to consumers, STP motor oil is entirely different; it provides efficient performance to the engine for a long time after one use. You can also use up to 6 packs together for a long time.


  • It controls sludge formation.
  • Wider mouth, easy to pour spout
  • Helps to maintain the fuel economy properly
  • Efficiently clean the main engine components
  • Protect against rust, corrosion, and other harmful effects
  • Insulate engine from wear and damaging effects


  • We didn’t find any critical issues.
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Using and Safety Tips

Best Conventional Motor Oil Consumer Reports

If you are new and using synthetic oil for the first time, then it is best to call a mechanic, and before using synthetic engine oil, you must read the company manufacturer’s instruction book, which will help you a lot in using it properly.

Things to Consider Before Buying the Conventional Motor Oil.

When you finally decide to buy conventional motor oil, you need to consider some more things before buying, and it will help you a lot to find the exact synthetic motor oil that is perfect for your vehicle. In this case, our guide will help you know about those things that need to be considered before buying. Let’s see.


The most important first thing is to choose the synthetic oil that is suitable for your car, tractors, or trucks. 

By doing this, you will get the best performance before the engine of your vehicle; also, you will get the perfect strength of your engine. All these machine oils are suitable to use for almost all vehicles so that you can pick from here any synthetic oil for your vehicle.


Another advantage that must be considered before purchasing is that large containers of synthetic oil tend to be relatively you get reasonable cost; if you want to choose synthetic oil among the great values, then selecting a large container will be the perfect choice for this.


Another important thing that many people do not notice before the purchase, again many people give it the most importance. When you choose synthetic oil, it is most reasonable to select according to your area’s climate.

For example, if your area has extremely cold temperatures, than 0W20 or 5W-20 synthetic oil will be the perfect choice for your vehicle, so your engine will start up quickly and your vehicle engine with proper shelter in cold weather.

Also, if you have come somewhere and it is hot, then 10W-40 is an excellent ideal choice. But many experts prefer to use 5W-20 or 0W20 because it is the perfect choice for any environment.

FAQ: Best Conventional Motor Oil

i. What is synthetic oil?

In short, synthetic oil is an engine lubricant made with artificial chemicals that enhance your vehicle engine’s performance and increases mileage, as well as many more features that are improving your engine.

ii. Is synthetic oil longer lasting than regular oil?

The short answer is, “Yes.” The synthetic oil is longer lasting than regular oil, there are many synthetic oils that can go up to 15,000 miles, but it depends on which brand of synthetic engine oil you are using. So in the field of choosing synthetic motor oil, you need to select a lot of things.

iii. Can I mix synthetic and regular oil?

The short answer is, “Yes.” You can mix both oils, and there is no danger. But traditional oil with synthetic oil will reduce its quality a lot; also, synthetic oil’s superior performance and advantage will reduce.

iv. Is conventional synthetic oil worth the cost?

If you compare the price of regular oil vs. conventional synthetic oil, In that case, you can see that synthetic oil is comparatively much more expensive than regular oil. In this case, its price is as costly as its features and many advanced levels compared to traditional engine oil.

It keeps your vehicle engine with effective strength, it also increase the life of the engine. In this way, the engine that uses synthetic oil has a longer lifespan than the machine that uses ordinary engine oil. Recognizing the overall aspect, it is understood that it is worth your cost.

v. What are the disadvantages of conventional synthetic oil?

Well, there are many advantages of synthetic oil. Also, there are some disadvantages of synthetic oil, it’s chances of additive precipitation, plus the biggest downside is the price, which is so expensive, which is two to four times more expensive than your regular oil.

vi. Is it OK to use conventional synthetic oil in older cars?

When you want to use synthetic oil in your old car, you have to monitor the engine all the time because their seals and other components are not tight; that’s why synthetic oil has a chance of leaking out in old models car engines.

So if you want to protect your car’s engine and other components from damage, then using synthetic oil will be perfect for your old car.

Many people think that it is not reasonable to use synthetic engine oil in old engine vehicles, but this is a completely wrong thing. If your vehicle is running, then you can use it, and the engine will give better performance.

Final Thought

In this article, we have shared a complete guide to best conventional motor oil consumer reports that include different features of synthetic oil. Here we have suggested the oil of all the best brands, which have received very good feedback from the users and our editors.

When you are looking for the best synthetic oil, you have to keep in mind a lot of things, all of the essential things which we have shared. Also, in the field of choosing synthetic oil, many people consider price as the most significant disadvantage, but in this case, it is better to say that price does not matter because the performance of synthetic oil should be considered the biggest.

I hope you found something new in this article.

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