9 Motor Oil Brands to Avoid in 2023

In automotive maintenance, choosing the right motor oil is paramount for your vehicle’s longevity and performance.

However, not all motor oil brands are created equal. Some fall short of meeting industry standards, potentially risking your engine. So you must know about which motor oil brands to avoid to stay safe.

In this article, we’ll navigate the slippery slope of motor oil selection by identifying brands you should avoid and providing insight into what makes these brands less than ideal for your vehicle.

Say goodbye to engine troubles as we guide you toward better choices for your car’s lifeblood.

Motor oil brands to avoid 1


9 Motor Oil Brands To Avoid (Fully Tested)

Questron Motor Oil

Questron Motor Oil is not an officially licensed product. The company has no affiliation with any car manufacturers and doesn’t have any certifications or approvals from the government or other organizations.

This means that Questron Motor Oil may be unable to meet your vehicle’s specific needs when it comes to lubricating your engine parts–and could even cause damage if used improperly!

Questron’s website contains very little information about what makes their products so special compared to other brands today (or even how they’re made).

Questron Motor Oil

There are also no customer reviews available online for this product line either–which makes it hard for consumers like yourself who want more information before making a purchase decision based on personal experience instead just relying solely upon marketing claims alone without knowing whether those claims are true or false since there’s nothing else out there besides.

Word-of-mouth recommendations from friends who might have tried using these oils themselves but didn’t give enough detail about why one person liked using them over another type of oil instead just saying something generic like “it worked well” without explaining why exactly why he thought so much better than others did not perform equally well under similar conditions?

Xpress Lube Pro Motor Oil

Xpress Lube Pro Motor Oil is a synthetic and conventional motor oil brand. It offers a variety of weights, including 5W-30 and 10W-30. The company’s website states that it uses “the highest quality base stocks available” to produce its products.

Xpress Lube Pro Motor Oil

Xpress Lube Pro Motor Oil is sold at participating quick lube locations throughout the United States and Canada. When you purchase motor oil, you want to ensure that it will protect your vehicle and provide good value for money. Xpress Lube Pro Motor Oil doesn’t offer either of these things.

It has poor protection capabilities and can wear out faster than other brands. The company also charges more than competitors like Pennzoil or Shell, but their product isn’t as good quality.

Bullseye Motor Oil

Bullseye Motor Oil is a brand that offers both synthetic and conventional motor oils. Their products claim to provide protection and performance but have been found to fall short when compared to more reputable brands in the industry.

Bullseye Motor Oil

Bullseye Motor Oil has been flagged as a brand to avoid for several reasons:

  • Inferior Quality: It has been reported that Bullseye Motor Oil may not meet industry standards, so it may not provide the necessary protection for your engine.
  • Lack of Transparency: Bullseye Motor Oil does not provide clear information about its product specifications, making it difficult for consumers to know if the oil suits their vehicle.
  • Poor Performance: Customers who have used Bullseye Motor Oil have reported experiencing engine problems, including decreased fuel efficiency and increased wear on engine components.

Liberty Motor Oil

Liberty Motor Oil is a motor oil brand that has been around since the early 20th century. It was created by the founder of Liberty Oil, who wanted to create an affordable alternative to other motor oils on the market at that time.

Liberty Motor Oils have been known for their reputation as being cheap, but not necessarily good quality products. They’re often sold at gas stations or auto parts stores where customers don’t have much choice in what brand they buy because it’s all they offer in stock.

Liberty Motor Oil

Why Avoid Liberty Motor Oil?

  • Poor Quality
  • High Prices
  • Inadequate Performance
  • Alternatives to Liberty Motor Oil

Petrola Motor Oil

Petrola Motor Oil is a brand of motor oil created by the founder of Petrola Oil, a company selling high-quality motor oil products. It’s often sold at gas stations or auto parts stores, but it has a reputation for being cheap and not necessarily good quality products.

If you see this label on your motor oil bottle, don’t be fooled into thinking that it’s just as good as other brands- it isn’t! If you want to buy quality motor oil for your car or truck, look for something else.

Why Avoid Petrola Motor Oil?

Petrola Motor Oil is a brand that offers poor quality, high prices, and inadequate performance. This brand of motor oil has been known to cause damage to your vehicle’s engine by causing sludge build-up in the engine’s valves and pistons.

The result?

A performance breakdown and an increase in fuel consumption are not exactly what you want from something as important as your car’s motor oil!

Xcel Motor Oil

Xcel Motor Oil is a motor oil brand that has been around since the early 1900s. It was originally called “Xcel” until it was changed to “X-1” in the late 1940s, but then changed back to Xcel in the 1950s. The company has been owned by Castrol since 2001, and they still produce their products today.

Xcel Motor Oil

Xcel Motor Oils are often sold at auto parts stores and gas stations across North America and online retailers like Amazon or eBay (although these may not be genuine).

They have several different types of oil available, including conventional and synthetic blends and diesel-specific varieties for use in trucks or large vehicles with diesel engines, such as semi trucks or buses.

The biggest problem with Xcel Motor Oils is that they don’t meet American Petroleum Institute standards–which means they could damage your car’s engine if used regularly over time!

Q10-40 Motor Oil

Q10-40 motor oil is a synthetic blend with no additives, so it’s not ideal for older cars. It also has a higher viscosity than traditional petroleum-based motor oils, which can cause problems with the seals in your engine.

If you have an older car or one with leaky seals, this type of oil may be more likely to cause leaks than other synthetic blends.

Everclear Motor Oil

Everclear Motor Oil is a new motor oil that promises to be more efficient than traditional. It also claims to be more effective at preventing wear and tear on your car’s engine, which can help save you money in the long run.

Everclear Motor Oil

However, there are several reasons why you should avoid using this product:

  • It contains alcohol, which means it’s flammable and may not work well in cold weather conditions (like when you’re stuck in traffic during winter).
  • Everclear is not compatible with all types of engines; if yours isn’t compatible with it, then it could cause damage to your car’s engine over time!

Quaker State Q Motor Oil

Quaker State Q Motor Oil is a synthetic blend motor oil that claims to be “engineered for your vehicle.” However, there are many reasons why you should avoid this product.

Quaker State Q Motor Oil

First, it uses Group III base oils (the cheapest kind), which have poor viscosity characteristics at high temperatures and low shear rates. This means they will flow poorly under normal driving conditions and may cause premature wear on your engine.

Second, Quaker State Q Motor Oil contains additives that can damage seals in older engines or those with low mileage–which is most engines these days!

These additives include: ZDDP (zinc dialkyldithiophosphate), TBN (total base number) improvers, and dispersants/antioxidants such as calcium sulfonate/phosphorus ester blends or molybdenum disulfide colloidal suspensions.

Does it matter which brand of motor oil I use?

Yes, the brand of motor oil you use does matter, as different brands offer varying levels of quality and protection for your engine. Motor oil is a lubricant reducing friction and protects engine components from wear and tear.

It also helps keep the engine clean by removing dirt and contaminants.

When choosing a motor oil brand, consider the following factors:

  1. Viscosity: Look for motor oil with the correct viscosity for your vehicle, as the manufacturer recommends. Viscosity affects the oil’s flow and performance at various temperatures.
  2. Additives: High-quality motor oil brands often include additives that enhance engine performance and protect against corrosion, wear, and sludge buildup.
  3. Certification: Ensure the motor oil you choose meets industry standards, such as the American Petroleum Institute (API) certification or the International Lubricant Standardization and Approval Committee (ILSAC) rating.
  4. Synthetic vs. Conventional: Synthetic oils can offer better performance and protection, especially in extreme temperatures, but may be more expensive. Conventional oils are typically more affordable but may require more frequent changes.
  5. Price: While the cheapest option may be tempting, investing in a reputable, high-quality motor oil brand can save you money in the long run by preventing engine damage.

Selecting the right motor oil brand for your vehicle can greatly impact its performance, longevity, and overall health.

Is there any difference in motor oil brands?

Yes, there are differences in motor oil brands, primarily regarding quality, additives, and certifications. High-quality motor oil brands use refined base oils and carefully formulated additives, contributing to better engine protection, performance, and longevity.

Additives in motor oil can vary among brands, and they play a vital role in enhancing the oil’s properties. Some common additives include detergents to clean the engine, dispersants to prevent sludge formation, and anti-wear agents for reducing friction and wear.

Certifications from the American Petroleum Institute (API) or the International Lubricant Standardization and Approval Committee (ILSAC) indicate that a motor oil brand meets specific industry standards. Reputable brands will display these certifications on their packaging.

In summary, differences in motor oil brands can significantly impact your engine’s performance and lifespan. Choosing a trusted brand that meets your vehicle manufacturer’s recommendations and industry certifications is crucial.

Should you use the same brand of oil for every oil change?

Using the same oil brand for every oil change is not strictly necessary, but it can have benefits. Consistency in oil brands ensures compatibility with the specific additives and formulations designed for your vehicle’s engine.

Some oils have unique proprietary additives that could result in less effective lubrication and protection when mixed with other brands.

Additionally, sticking to a reputable brand ensures quality, reducing the risk of potential issues caused by low-quality products.

Should you use the same brand of oil for every oil change

However, as long as you adhere to the manufacturer’s recommendations for oil type (synthetic, conventional, or blend) and viscosity, switching between reputable brands should not pose significant issues.

Prioritize meeting your vehicle’s specifications and maintaining a consistent oil change schedule over brand loyalty. In summary, while using the same oil brand can provide optimal engine performance, it is not mandatory as long as you follow the manufacturer’s guidelines and choose high-quality products.

What to look for in a bad motor oil?

Viscosity Index

The viscosity index is a measurement of how motor oil changes viscosity with temperature. It’s measured in Centistokes (cSt) units and can range from 0 to 150, with anything over 100 considered good quality.

What to look for in a bad motor oil

Oil Type

The type of oil you choose depends on your vehicle and its manufacturer. The most common types of motor oil include:

  • Mineral oil-based blends
  • Synthetic esters (e.g., polyalphaolefins [PAOs])
  • PAO/synthetic blends

Quality of Additives

The quality of an oil’s additives is important because they help prevent sludge build-up, reduce friction between moving parts, and lubricate internal components like piston rings, valve stems, and camshafts.

The most common additive package includes detergents that help break down carbon deposits; dispersants that keep dirt suspended in the oil rather than settling on engine parts; anti-wear agents to protect against wear on these same parts; corrosion inhibitors to protect against rusting; anti-foaming agents to keep air bubbles from forming in your engine’s cooling system; seal conditioners that keep seals supple so they don’t crack or leak prematurely.

Driving Conditions

The first thing you should consider when choosing a motor oil is how often you’ll be driving in different conditions. If, for example, your car only sees rain once or twice per year and never encounters temperatures below freezing, then an SAE 30-grade oil is probably fine for your vehicle.

On the other hand, if it frequently rains where you live and/or the temperature drops below freezing during winter months (or even extended periods), then an SAE 40-grade oil would be better suited for your needs.

Another factor affecting what kind of motor oil is best for your car is its age: older vehicles may require more protection from wear because their engines tend to run hotter than newer ones due to less efficient cooling systems.

API Rating

The API rating measures oil’s ability to protect your engine. The most common ratings are SAE 10W-30 for gasoline engines and SAE 5W-20 for diesel engines. The higher the number, the thinner the oil is.

Thinner oil allows more flow through tight spaces in your engine and keeps it cooler by reducing friction between moving parts (which can cause damage).

However, it also means that this type of oil drains more quickly when you change your car’s oil filter or take it in for service at an auto shop–so keep that in mind when choosing what kind of motor oil you want to put into your vehicle!

ILSAC Standards

The International Lubricants Standardization and Approval Committee (ILSAC) is an independent organization that sets standards for motor oil. These standards determine the quality of engine oil and how well it will protect your engine from wear, damage, and corrosion.

Motor oils are rated according to their viscosity index (VI), which measures how quickly they thicken when cold or thin out when hot. A low VI number means that the oil will flow well at both high and low temperatures- good news if you live in a hot climate!

Synthetic vs. Conventional Oils

Synthetic oils are made from synthetic compounds, which means they’re not found in nature.

Conventional oils are derived from natural sources like petroleum or coal tar. Synthetic oils have been around for decades and have become increasingly popular with consumers due to their many benefits over conventional oils:

  • Synthetics last longer than their conventional counterparts because they’re more stable at higher temperatures. They also resist oxidation better than conventional oils, so they don’t break down as quickly when exposed to air (which causes them to lose viscosity).
  • Synthetics offer superior lubrication properties compared with other lubricants, including those used by automakers today. This means that your engine will run smoother and quieter than if it were using a conventional oil blend–and you’ll save money on maintenance costs over time!

3 Best Motor Oil Brands of 2023

The automotive industry has witnessed significant advancements, and with it, the development of essential products to enhance vehicle performance, such as motor oil, has evolved. Motor oil is vital in keeping engines lubricated, clean, and cool, ensuring they run smoothly and efficiently.

Among the market’s vast array of motor oil brands, three stand out for their exceptional quality, performance, and reputation: Mobil 1, Castrol, and Valvoline.

Mobil 1

A product of ExxonMobil, Mobil 1 is widely recognized as one of the best synthetic motor oils in the industry.

Known for its advanced technology, Mobil 1 offers excellent protection against wear and tear, enhances fuel efficiency, and provides outstanding thermal and oxidation stability.

Its fully synthetic formula ensures low-temperature performance, reducing the risk of engine failure during cold starts.

Mobil 1

Mobil 1’s Extended Performance line, which guarantees protection for up to 15,000 miles, has garnered a loyal following among vehicle enthusiasts. With a history of partnering with leading car manufacturers and motorsports teams, including Porsche, Bentley, and Formula 1, Mobil 1’s reputation speaks for itself.



A British icon in the motor oil industry, Castrol has been a trusted name for more than a century.

Their product range caters to various vehicle types, including passenger cars, motorcycles, and commercial vehicles.

Castrol’s EDGE line, a fully synthetic motor oil infused with their unique Fluid Titanium Technology, offers superior engine performance and protection against metal-to-metal contact.

This innovative formula increases fuel efficiency, reduces emissions, and prolongs engine life. Castrol’s ongoing commitment to research and development and its collaboration with automotive giants like Volkswagen and Jaguar has earned it a top spot in the motor oil market.


Established in 1866, Valvoline is one of the oldest and most respected motor oil brands in the United States.

Renowned for their high-quality products and dedication to innovation, Valvoline offers a broad range of motor oils, including conventional, synthetic blend, and full synthetic options.

Valvoline’s SynPower line, formulated with premium synthetic base oils and advanced additives, delivers excellent engine protection, fuel efficiency, and high-temperature performance.


The MaxLife series, specifically designed for high-mileage vehicles, helps rejuvenate aging engines and prolong their life. Valvoline’s extensive history and commitment to customer satisfaction make it a reliable choice for motor oil consumers.

In conclusion, Mobil 1, Castrol, and Valvoline are the top motor oil brands due to their exceptional quality, performance, and innovation. These brands have earned the trust of consumers and automotive professionals’ trust, ensuring optimal engine health and longevity. When it’s time for your next oil change, consider one of these three industry leaders to keep your engine running at its peak.


In conclusion, choosing the right motor oil is crucial when it comes to maintaining your vehicle’s engine health and performance.

While the market is flooded with numerous motor oil brands, it’s essential to be aware of those that may not meet industry standards or provide adequate protection.

By avoiding subpar motor oil brands and opting for reputable, quality options, you can ensure your engine’s longevity, minimize potential damage, and optimize overall performance.

Always prioritize research, seek expert advice, and heed manufacturer recommendations to make an informed decision and keep your vehicle running smoothly.

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