Why Can’t You Go Back to Regular Oil After Synthetic Oil? | Should You Switch To Synthetic Oil in Your Car?

Both regular oil and synthetic oil serve the same purpose and can be used interchangeably. However, many people have misunderstood that switching from synthetic to regular oil is harmful. However, it’s important to understand that these two oil types do have some differences. Both synthetic and conventional oils are designed to lubricate the engine parts of your vehicle and maintain its performance.

What Happens If You Switch Back To Regular Oil After Synthetic

One key distinction is that synthetic oil is inherently more slippery compared to regular oil due to its additives. This characteristic can potentially lead to leaks in older engines not designed to handle such slickness, which may result in safety issues and costly repairs.

If you are using synthetic oil, then you shouldn’t go back to regular oil because when you switch from synthetic oil to regular oil, you will see a clear reduction in the engine performance. Synthetic oil generally offers higher quality and better overall performance than regular oil. This article mainly explains the key differences between conventional oil and synthetic oil.

What Is Conventional Oil?

Conventional Oil, regular oil

Conventional oil also referred to as mineral oil or regular oil, is derived from crude oil through a refining process that grants it decent lubricating properties. But being a natural product, it retains some inherent irregularities that cannot be completely eliminated through purification. This is where synthetic oil steps in.

However, despite its advantages, regular oil remains a viable and cost-effective option, especially if your engine is compatible with it and you adhere to regular oil change intervals.

What Is Synthetic Oil

Synthetic oil is one of the most famous types of engine oil that is formulated and synthesized in a laboratory instead of being directly obtained from crude oil like regular or mineral oil.

Synthetic Oil

This oil is made by chemically modifying and refining petroleum molecules to make a product with controlled and specific features. The main purpose of this process is to obtain a high-performance lubricant that delivers outstanding benefits over regular oils.

Synthetic oil serves as a flawless substitute for regular oils due to its tightly controlled composition.

The predictability and guaranteed performance of synthetic oil under various stress levels and temperatures make it a favored choice. Engine manufacturers can confidently design their engines, knowing precisely how the recommended synthetic oil will behave with the engine across various temperature ranges.

In addition to the laboratory modifications, synthetic oils contain purposeful additives. These additives are formulated to both protect and clean the vehicle engine, providing enhanced benefits beyond conventional oils.

Can I mix synthetic oil and conventional oil?

Mixing conventional oil and synthetic oil is not recommended by engine and automobile oil producers. The primary reason for this is that synthetic oil is specifically planned to outperform and provide superior protection compared to conventional oils.

synthetic oil and conventional oil

Synthetic oils are designed to be more resistant and durable, offering an improvement in engine performance.

Due to the distinct properties and characteristics of synthetic oil, combining it with conventional oil may compromise its performance advantages.

Why can’t you go back to regular oil after synthetic?

You shouldn’t switch from synthetic oil to regular oil because switching from synthetic oil to regular oil or conventional oil in your engine may lead to increased engine wear and tear and reduced performance.

Synthetic oils have the ability to offer outstanding protection and improved performance, especially in challenging conditions and extreme temperatures. On the other hand, regular oil can’t deliver the same level of resilience to withstand such stress.

Synthetic oils deliver advanced lubrication, ensuring better protection for engine parts. But regular oil can’t provide the same level of lubrication and protection, potentially compromising the performance of your engine.

In summary, while synthetic and regular oil have similar applications, their specific properties may affect certain engines differently. You should consult your car’s manual and consider your engine’s age and condition before making an oil change decision.

Benefits Of Sticking To Synthetic Motor Oil

Synthetic oil offers a superior alternative. This oil is meticulously produced to deliver consistent and ideal lubrication for the engine. The benefits of using synthetic motor oil are given below:

1) Outstanding Wear Protection

When your car moves at high speed, its engine parts continuously come into contact with each other, causing friction and wear. This friction between the engine components may lead to premature failure.

To protect these vital parts, engine oils perform as a protective barrier. Synthetic oil, in particular, offers extended wear and tear protection than regular oil. This helps maintain the engine components in ideal condition, ultimately improving their service life.

2) Better Turbocharger Protection

In modern cars with turbo engines and smaller engines, synthetic oils are really helpful.

These oils flow more swiftly to the rotating parts of the engine, making sure everything is well-lubricated and meeting the engine’s needs perfectly. This superior lubrication is especially advantageous for turbocharged cars, as full synthetic oils keep them performing at their best.

3) Optimized Fuel Consumption

Synthetic oils last much longer than regular oils. Usually, it is recommended to change your synthetic oil every 5000 to 7000 miles, but some really good types may even go up to 15000 to 25000 miles before needing a change. So, synthetic oils save your time and money because you don’t have to change them as often.

4) Keeps the Engine Cleaner

As the oil circulates through the engine, it collects deposits. Over time, regular oil tends to form sludge, which can decrease the performance of the engine and shortens its service life. However, synthetic oil is designed with fewer impurities, so it resists forming sludge in the engine.

If you already have sludge, switching to the best synthetic oils during an oil change can help clean it up, making your engine work better and last longer.

6) Stable Viscosity

One of the advantages of synthetic oil is its higher viscosity index. Synthetic oil stays the same thickness in hot or cold temperatures, which helps your engine work well no matter the weather.

It keeps its consistency when you start the engine and while it’s running, making it stable and reliable.

Synthetic vs. Conventional Oil

Synthetic OilConventional Oil
Synthetic oil is made by modifying and refining petroleum molecules to make a product with controlled and specific features.Conventional oil is derived from crude oil through a refining process that grants it decent lubricating properties.
It offers more stable viscosity across different temperature range.The viscosity of the conventional oil may vary with temperature variation.
Synthetic oil offers extended wear and tear protection than regular oil.It is not as effective as synthetic oil.
It has very fewer impurities and dirt.It has very high impurities.
It is very expensive.It has low cost.
Synthetic oil has a long service life.It needs more frequent oil changes.


Is Switching to Full Synthetic Oil in Higher Mileage Vehicles Useful?

Using full synthetic oil will bring numerous advantages to your high-mileage vehicles. With better lubrication and enhanced cleaning properties, you can expect improved engine performance and longer service life. Additionally, synthetic oil’s properties may assist in detecting slow leaks early on, preventing potential issues down the road.

What happens if you put conventional oil in a car that requires synthetic?

If you use conventional oil in a vehicle that needs synthetic oil may cause poor engine performance and severe damage to the engine parts. Synthetic oils are designed to offer superior lubrication, control higher temperatures, and deliver outstanding protection than conventional oil. Therefore, switching from synthetic oil to conventional oil may lead to increased wear and tear on engine parts, decreased fuel economy, and complete failure of the engine over time.

Can you go back to conventional oil after using synthetic?

Yes, you can switch back to using conventional oil after using synthetic oil for a vehicle designed for conventional oil. You can safely switch back to conventional oil, but constantly observe your vehicle’s performance closely and follow the owner’s recommendations for oil change intervals.

Should I switch to synthetic oil?

If your engine is designed for synthetic oil, making the switch can be a wise decision. Synthetic oil has the ability to perform exceptionally well across a wide temperature range, making it particularly suitable for vehicles equipped with turbochargers, variable valve timing, direct injection, or superchargers that operate under higher temperatures. Switching to synthetic oil is an ideal step to improve the engine health and efficiency of your high-mileage vehicle.

Can you use synthetic oil after using regular oil?

Yes, switching to synthetic oil after using regular oil is possible, but it is crucial to consult your vehicle’s service manual regarding synthetic oil compatibility with your engine. Switching from regular to synthetic oil is considered an upgrade.

Is it a good idea to use Synthetic Oil in older cars?

When it comes to older cars, whether you can use synthetic oil depends on the car manufacturer’s recommendations. Many old vehicles are designed for regular oil use, and switching to synthetic oil might lead to issues like oil leakage. but if the owner’s manual permits the utilization of synthetic oil, it can be the best option.

What is the life of full synthetic oil?

The longevity of synthetic oils varies based on the type of vehicle you own. It typically lasts between 7,500 and 15,000 miles. For precise figures, it is essential to refer to your car’s service manual.

Is full synthetic oil always better?

In case of all temperatures, synthetic oil offers superior stability and viscosity compared to regular oil or conventional oil. The design of this oil ensures smooth flow in winter temperatures and resistance to high temperatures, letting the engine to perform optimally throughout the year.

Does oil go bad if you don’t drive?

Regularly changing engine oil is crucial for maintaining a smooth-running car. But if your vehicle is not driven frequently, the oil can deteriorate over time, emphasizing the importance of periodic oil changes.

What Happens If You Switch from Regular Oil to Synthetic?

Synthetic oils have the ability to offer outstanding protection and improved performance, especially in challenging conditions and extreme temperatures. Synthetic oils deliver advanced lubrication, ensuring better protection for engine parts. When you use synthetic oil in your engine, you will see a clear improvement in your engine performance.

Does switching to synthetic oil cause leaks?

When you switch to synthetic oil, it usually won’t cause a leak in your engine. Synthetic oil has low viscosity and flows more easily than regular oil, but it’s not a major cause of leaks. If your engine already has a weak point or place from where oil may leak, then synthetic oil might have a slightly higher chance of seeping through compared to conventional oil.

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