If you have ever taken your car in for an oil change, chances are you have been asked a question that sounds simple but can feel confusing in the moment: “Do you want synthetic oil or conventional oil?” It is one of those decisions that might not seem too important at first glance. After all, oil is just oil, right?

Actually, not quite.

While both synthetic and conventional oils serve the same essential purpose; to lubricate your engine and keep it running smoothly, they are not created equal. There are real differences in how they are made, how they perform, and how often they need to be changed. At LOF Xpress™, we believe it is important for drivers to understand these differences so they can make the best choice for their vehicles.

Let’s take a closer look at how synthetic and conventional oils compare and why one might be a better fit for your car than the other.

What Is Conventional Oil?

Conventional oil is the standard motor oil that has been used in vehicles for decades. It is derived directly from crude oil that is pumped from the ground. After being extracted, this oil is refined to remove impurities and improve its performance as an engine lubricant.

Conventional oil does a solid job of protecting your engine. It coats internal engine components and reduces friction between moving parts. This helps to prevent wear and tear, reduces the risk of overheating, and keeps the engine clean by carrying away small particles of dirt and debris.

While conventional oil is usually less expensive than synthetic oil, it tends to break down faster. That means it typically needs to be changed more frequently. For most vehicles running on conventional oil, the recommended oil change interval is around every 3,000 to 5,000 miles, depending on driving habits and manufacturer guidelines. As automotive technology continues to evolve, a vast majority of new vehicles are now manufactured to require synthetic oil for optimal performance and protection.

What Is Synthetic Oil?

Synthetic oil starts off as a base oil, just like conventional oil, but then it goes through a more advanced chemical engineering process. During this process, the oil molecules are refined, broken down, and rebuilt in a lab. This allows scientists to create a lubricant with a more consistent molecular structure, which translates to better performance in your engine.

Because synthetic oil is engineered to perform at a higher level, it offers several advantages over conventional oil. It handles extreme temperatures more effectively, resists breaking down under pressure, and provides superior protection against engine wear. It is also better at keeping your engine clean because it is designed to resist sludge and deposit formation.

In general, synthetic oil lasts longer than conventional oil. Many vehicles using synthetic oil can go between 7,500 and 10,000 miles between oil changes, and in some cases even longer, depending on the make and model.

The Key Differences

To better understand whether synthetic or conventional oil is right for your vehicle, it helps to break down the main differences across several important factors.

1. Performance in Extreme Temperatures

Synthetic oil is designed to perform well in both very hot and very cold conditions. In cold weather, it flows more easily, which means it gets to your engine components faster at startup. In hot conditions, it maintains its stability and does not break down as quickly as conventional oil.

Conventional oil thickens more in the cold and thins out more when temperatures rise. This can affect how well it lubricates your engine and may lead to more wear over time, especially if you live in an area with harsh seasonal weather.

2. Engine Cleanliness

Synthetic oils contain fewer impurities and are better at resisting sludge and deposit buildup. Over time, this can lead to a cleaner, more efficient engine.

Conventional oil is more likely to form sludge and leave behind deposits. This can reduce engine efficiency and eventually contribute to mechanical problems if the oil is not changed regularly.

3. Longevity and Oil Change Intervals

One of the major benefits of synthetic oil is how long it lasts. Because it is more stable and resistant to breakdown, it does not need to be changed as often. While always following your vehicle’s manufacturer guidelines, synthetic oil can often go twice as long between changes compared to conventional oil.

If you are someone who drives a lot or just wants the convenience of fewer oil changes, synthetic oil may be worth the added cost.

4. Price

Conventional oil wins on price in the short term. It is typically less expensive per quart and can be a good choice for older vehicles or those with very basic engine requirements.

Synthetic oil costs more upfront, but the longer intervals between oil changes and better engine protection can lead to long-term savings by helping you avoid costly repairs down the road.

5. Environmental Impact

Since synthetic oil lasts longer and requires fewer oil changes, it can reduce the amount of waste oil being disposed of. Additionally, some synthetic oils are made from more eco-friendly sources or even recycled materials.

While conventional oil is still widely used and recycled, it generally contributes more to oil waste because it has to be replaced more frequently.

Which One Should You Choose?

There is no one-size-fits-all answer, but here are a few general guidelines to help you decide:

  • If you drive a newer car, especially one with a turbocharged or high-performance engine, your manufacturer may already recommend synthetic oil. In fact, many modern vehicles are designed to run exclusively on synthetic.

  • If you live in an area with extreme temperatures or do a lot of stop-and-go driving, synthetic oil can offer better protection.

  • If you drive an older car or a vehicle with a simple engine that has always used conventional oil, sticking with conventional might be fine, especially if you are consistent about oil change intervals. However, If your older vehicle is over 75k miles, many experts suggest switching to a high-mileage oil.

  • If convenience matters to you, the extended interval between changes with synthetic oil might make it worth the investment.

Still unsure? That is where our team at LOF Xpress™ comes in.

LOF Xpress™ Can Help You Decide

At LOF Xpress™, we are here to make your oil change experience as smooth and stress-free as possible. Whether you are leaning toward synthetic oil or sticking with conventional, our experienced technicians can help you choose the best option for your vehicle and driving style. We carry both types of oil and will always follow your manufacturer’s recommendations.

We also pride ourselves on being fast, friendly, and professional. Most oil changes at our shops take between just 7-10 minutes, and you can stay in your car the entire time or wait in our comfy waiting area. No appointment needed, just pull in and we will take care of the rest.

If you are in central Iowa, you can visit us at any of our three convenient locations in Ankeny, Ames, or Waukee. Whether you are due for a routine oil change or just have questions about what kind of oil is best for your engine, we are here to help.

Stop by LOF Xpress™ today and let us keep your car running better, longer, and cleaner.