Switching to Synthetic Oil After 200k Miles – Learn The Facts!

Before switching to synthetic oil in an older car that has over 200 miles, there are a few things you should take into consideration. One of the most important thing is to make sure your engine seals are in excellent condition.

Synthetic oil can effectively clean away sludge formation in high-mileage cars, so it is best to keep your engine sealed tight.

In this post, we are going to explain all you need to know so that you can have a better understand before making the switch.

Can You Switch to Synthetic Oil With High Mileage

Let’s start by saying that motor oil is an integral component of car maintenance, cleaning, lubricating, cooling, and protecting various mechanical components within the engine. Not only that but it helps to keep your car running smoothly by reducing wear-and-tear and damage.

The good news is that modern synthetic oils have been refined to be more breathable and less damaging to engine seals than earlier versions of the product, enabling them to be used in older vehicles.

Though you may be tempted to make the switch and switch your vehicle’s oil for synthetic, there are a few things you should be aware of before actually making such a major change.

Also before going ahead and making the switch, it is recommended that you consult with a technician just to be on the safe side. The thing is that they can assess your vehicle and suggest the most suitable motor oil for you. They will also notify you when an oil change is due.

Switching to Synthetic Oil After 200k Miles

Switching to Synthetic Oil After 200k Miles

If it’s a case where your vehicle has high mileage, synthetic oil may be on your mind. This is an effective way to guarantee that your engine stays in a superb condition and prevent any future issues with it.

With that being said, some people believe that switching over to synthetic oil can cause gasket leaks in older cars.

It is safe to say that this myth has been spreading for years, but it is untrue. Some full synthetic oils contain seal swellers and gasket conditioners which help prevent leaks.

If you are uncertain about the safety of switching to synthetic oil with your high mileage car, consult a professional mechanic first. They can inspect your car and inform you if it’s secure for you to do so.

Read Also: Switching to Synthetic Oil After 100k Miles

Switching From Conventional Oil to Synthetic Oil

Synthetic oil has several major advantages, including enhanced performance, improved cleanliness and longer intervals between changes – all of which can help save you money on expensive engine repair costs.

However, switching to synthetic motor oil in an older vehicle with high mileage carries certain risks. For instance, synthetic oil can dislodge sludge that was previously sealed inside your engine and lead to leaks.

Another potential risk is that your vehicle’s seals might not be compatible with synthetic oil, leading to oil leaking out and potentially damaging the engine.

If you’re uncertain of the risks associated with switching to synthetic oil, you should opt for a high-mileage synthetic oil that contains additives designed to rejuvenate and swell engine seals. Apart from that, these items contain stronger detergent packages which help remove carbon deposits around piston rings that could contribute to oil burning.


Switching to synthetic oil is a great option for drivers who have recently covered an extensive amount of miles. Synthetic oil tend to have several advantages over conventional oil, such as its capacity to remove sludge buildup and enhance engine performance.

Sludge is a sticky residue that builds up in engines due to various causes. It may also form around engine seals that have become worn down over time, leading to oil leaks.

High-mileage synthetic motor oil contains additives that rejuvenate and protect worn engine seals, stopping leaks. It also helps remove sludge and reduce oil loss from burning.

Let’s not forget that synthetic oil has a lower volatility than traditional oils, allowing it to flow more smoothly and ensure your vehicle runs optimally.