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What happens if you put regular oil in a synthetic car?


As a seasoned auto service provider, I often encounter questions about the differences between regular and synthetic motor oils. Many car owners wonder what might happen if they accidentally use regular oil in a vehicle that requires synthetic oil. Understanding the implications of this choice is crucial for maintaining your vehicle's performance and longevity.


The Basics of Motor Oil


Motor oil plays a vital role in the functioning of your vehicle's engine. It lubricates moving parts, reduces friction, and helps to keep the engine clean. There are two primary types of motor oil: regular (conventional) oil and synthetic oil. Each type has its own unique properties and benefits.


Differences Between Regular and Synthetic Oil


Regular oil is derived from crude oil and contains natural impurities. In contrast, synthetic oil is chemically engineered to provide superior performance. Here are some key differences:



  • Temperature Resistance: Synthetic oil performs better in extreme temperatures, maintaining viscosity and protecting the engine.

  • Engine Cleanliness: Synthetic oil contains additives that help keep the engine cleaner by reducing sludge and deposits.

  • Longevity: Synthetic oil generally lasts longer than regular oil, requiring fewer oil changes.


What Happens When You Use Regular Oil in a Synthetic Car?


If you put regular oil in a car designed for synthetic oil, several issues may arise:



  • Increased Engine Wear: Regular oil may not provide the same level of protection, leading to increased wear and tear on engine components.

  • Reduced Performance: The engine may not perform optimally, resulting in decreased fuel efficiency and power.

  • Potential for Sludge Buildup: Regular oil can break down more quickly, leading to sludge buildup that can clog engine passages.


What Should You Do If You Accidentally Use Regular Oil?


If you realize you've put regular oil in your synthetic car, it's important to take action:



  • Check the Owner's Manual: Review your vehicle's manual for specific recommendations regarding oil types.

  • Consider an Oil Change: If possible, change the oil to the recommended synthetic type as soon as you can.

  • Monitor Engine Performance: Keep an eye on how your vehicle is running and be alert for any unusual noises or performance issues.


Conclusion


Using regular oil in a synthetic car can lead to several negative consequences, including increased engine wear and reduced performance. It's always best to adhere to the manufacturer's recommendations for oil type to ensure your vehicle runs smoothly and efficiently. If you're ever in doubt, consult with a professional mechanic to get the best advice for your specific vehicle.


Frequently Asked Questions

Can you add oil to a hot engine?


The high temperatures of the engine can cause the oil to vaporize and create a flammable atmosphere. Additionally, pouring oil onto a hot engine can lead to splattering and burns. It is always recommended to allow the engine to cool down before adding oil to minimize the risks associated with hot oil and a hot engine.



Is fully synthetic oil bad for old engines?


Modern synthetic oil is safe to use in all types of vehicles, ranging from new purchases to classics to aging not-so-classics. The idea that synthetic oil could harm old engines probably comes from a time before synthetic oils had been extensively tested.



Will the wrong oil damage my engine?


Potential Damage: While using the wrong oil may not cause immediate damage, it can lead to long-term problems such as increased engine wear, overheating, and ultimately, engine failure. It's crucial to use the type of oil recommended in your owner's manual to ensure optimal performance and longevity of your engine.



Why is synthetic oil not recommended?


Synthetics may be more prone to additives precipitation during cold storage conditions. This stratifies certain additives which can potentially lead to their complete separation from the oil. Multi-grade motor oils using synthetics may exhibit slightly less fuel economy at highway speeds compared to mineral oil.



Will mixing synthetic and regular oil damage engine?


Mixing synthetic oil and mineral oil generally does not damage an engine, as both types of oil are designed to meet similar performance standards and are compatible to some extent. However, there are a few considerations to keep in mind:



Why can't you go back to regular oil after a synthetic car?


Synthetics contain different detergents, seal-swellers, and other additives, but there's nothing there preventing you from going back to normal oil.



What happens if you put a different type of oil in your car?


Using an engine oil of higher viscosity than recommended by the manufacturer can lead to a decrease in fuel economy. Thick oils increase the level of resistance of the engine's moving parts, like pistons, requiring the engine to work harder in order to overcome the resistance, hence burning more fuel.



What happens if you put 5W-20 instead of 5W-30?


As already said, both 5W-20 and 5W-30 are the same viscosity when the engine is cold. The 5W-20, however, will remain a little thinner once you reach operating temperature to help improve fuel economy and flow fast enough to fill the tight tolerances in the engine.



What happens if you use regular oil instead of synthetic?


Answer. Synthetic oils typically provide better protection than conventional oils, but switching back and forth between full synthetic and conventional oil will not damage the engine. Of course, this depends on the current engine condition and the quality of the conventional oil being used.



Will it hurt your engine to switch to synthetic oil?


When it comes to doing oil changes, switching between synthetic and conventional oil is perfectly okay. Despite the oil myths, both oil types are compatible with each other – no engine flush needed. So, simply making the switch will not cause any damage to your engine nor impact your travels.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.