Is high mileage oil good for your car?



Who needs high mileage oil? Cars with more than 75,000 on their odometer can usually benefit from high mileage oil. Older vehicles with fewer miles can benefit too, as engine seals can erode over time regardless of mileage. Degraded seals mean leaking oil, and leaking oil means your engine isn’t working at its best.

Does high mileage oil really make a difference?

The main difference between regular motor oils and high mileage ones is typically in the additives that have the task of minimizing the roughness on the engine’s metal surfaces by filling the tiny microscopic cracks thus creating smoother mechanical surfaces.

Can high mileage oil cause problems?

High-mileage motor oil doesn’t hurt and it could prevent leaks from starting. Most vehicle manufacturers would say it’s normal for an engine to consume some oil between oil changes.

When should you use high mileage oil?





The first is to switch when your vehicle reaches 75,000 miles. The second is to switch if your older vehicle is beginning to show signs of engine loosening. If you notice an oil drip, that’s a sign you should start using high-mileage engine oil.

Does high mileage oil clean engine?

Most high mileage oils have more than just the elastomer conditioners. They often have features like anti-wear additives, and dispersants and detergents to break up sludge and keep your engine clean.

Will high mileage oil hurt a new car?

Using a high-mileage oil in a new vehicle would be ill-advised, since no manufacturer recommends this type of oil for a new vehicle. Would it harm your engine? Most likely not, but it would be better to adhere to what is specified in the owner’s manual, at least until the warranty has expired.

What is better full synthetic or high mileage?

Full synthetic oils offer better performance than high-mileage oils because they’re low density and flow better. In contrast, high-mileage oils have higher viscosity which means your engine will have to work extra hard to push the oil, leading to reduced performance.

Is high mileage oil the same as synthetic?





High mileage oils are usually synthetic oils. They are typically based on either full-synthetic oil or a blend of synthetic and conventional oil.

How long does high mileage synthetic oil last?

10,000 to 15,000 miles

Davis says that educated drivers should opt for longer lasting, better performing synthetic oils, which are “most likely good for 10,000 to 15,000 miles or six months” whether or not their manufacturers recommend more frequent changes or not.

Is Thicker oil better for older cars?

A: Yes. This is a practical method to improve oil pressure in an older, high-mileage engine. The slightly thicker oil film from the heavier base weight oil – 10W – can help protect worn engine bearings as well.

Can I mix high mileage oil with regular oil?

High-mileage motor oil.



As you can see, each of these oils is scientifically formulated. Mixing them will not improve the performance or efficiency of your engine in any way. Nor will mixing improve the oil performance, either.



Is high mileage oil thicker?

High mileage oils contain viscosity modifiers that are durable and won’t diminish over time. This causes the oil to stay thicker for longer periods of time, helping protect your engine parts.

What is considered high mileage for a car?

What is considered high-mileage? Typically, putting 12,000 to 15,000 miles on your car per year is viewed as “average.” A car that is driven more than that is considered high-mileage. With proper maintenance, cars can have a life expectancy of about 200,000 miles.

Which oil is the best for cars?

Best Engine Oil for 2022

  • Mobil 1 Extended Performance motor oil. Best engine oil overall. …
  • Castrol GTX Magnatec motor oil. Best engine oil overall runner-up. …
  • Pennzoil Ultra Platinum full synthetic motor oil. Best synthetic engine oil. …
  • Amsoil Signature Series synthetic motor oil. …
  • Valvoline Advanced full synthetic motor oil.


Does high mileage oil stop leaks?

Fights friction in vehicles with over 75,000 miles / 120,000 km and helps protect against engine wear by providing a thicker cushion between moving engine parts.



Should I change my oil based on time or mileage?

What is High mileage oil? The truth

Does high mileage oil swells seals?

High mileage oils contain seal conditioners, which cause gaskets and seals on mating surfaces to swell.

What’s the difference between high mileage oil and synthetic?

High Mileage with MaxLife Technology is created using a blend of natural and synthetic oils as its foundation, while Full synthetic High Mileage with Maxlife™ Technology uses an even more robust base of entirely synthetic oil. Either way, they contain similar additives to address the problems related to wear.

How often should you get a high mileage oil change?

It used to be normal to change the oil every 3,000 miles, but with modern lubricants most engines today have recommended oil change intervals of 5,000 to 7,500 miles. Moreover, if your car’s engine requires full-synthetic motor oil, it might go as far as 15,000 miles between services!

Is it safe to put synthetic oil in a high mileage engine?

Myth: Full synthetic oil is not good for high mileage cars or older vehicles. The myth is rooted in the idea that synthetic oil is “slipperier”—lower in viscosity, or not as compatible with seals and will therefore leak or leak more in places conventional oil might not. Again, completely untrue.



How long does high mileage synthetic oil last?

10,000 to 15,000 miles

Davis says that educated drivers should opt for longer lasting, better performing synthetic oils, which are “most likely good for 10,000 to 15,000 miles or six months” whether or not their manufacturers recommend more frequent changes or not.

What is the best motor oil for older cars?

What are the Top Ten Best Oils for Classic Cars?

  • Castrol GTX Classic. …
  • Z-ROD® 20W-50 Synthetic Motor Oil. …
  • Valvoline VR1 Racing 20W-50 Motor Oil. …
  • Shell Rotella Synthetic Blend 15W-40 Diesel Oil. …
  • Lunati 15W-50 High Zinc. …
  • Pennzoil SAE 20W-50 Motor Oil. …
  • Liqui Moly 4T Street 20W-50 Engine Oil. …
  • Mobil 1 Flat Tappet 10W-40 Engine Oil.