What Exactly Is High-Mileage Oil?

High-mileage oil is specially formulated for vehicles that have more than 75,000 miles on the clock. These oils contain extra additives designed to help reduce engine wear and keep things running efficiently. They usually mix synthetic and conventional oils to create a thicker consistency, which helps prevent leaks from worn seals and gaskets.

As engines age, they tend to develop more wear and tear. High-mileage oil is meant to slow this down by providing better protection and lubrication. It includes components like seal conditioners, viscosity modifiers, detergents, friction modifiers, and anti-corrosion agents. These ingredients work together to maintain engine performance and extend its life.

Plus, high-mileage oil is often a synthetic blend, offering better temperature stability and longer-lasting protection compared to regular oil. This means it won’t get too thick in winter or too thin in summer, helping your engine run more smoothly year-round.

Is High-Mileage Oil Necessary?

Back in the 1990s, cars typically lasted around 130,000 miles. Today, with proper care, many vehicles go much further. But even with modern engineering, engines still show signs of aging after a while—especially around the 100,000-mile mark.

Common signs include increased oil consumption, louder engine noises, and more frequent oil leaks. At this point, high-mileage oil can be beneficial. It helps protect seals and gaskets, reduces oil consumption, and keeps the engine cleaner by preventing sludge buildup.

However, if your car is still running smoothly with no leaks or unusual noises, there may be no need to switch just yet. Regular maintenance and oil changes are still the best way to keep your engine in top shape.

The Benefits of Using High-Mileage Oil

High-mileage oil offers several advantages over regular oil, especially for older engines:

Reduces Leaks and Oil Consumption

Older engines often develop leaks due to dried-out or cracked seals. High-mileage oil helps keep these parts supple and less prone to cracking, reducing oil loss and preventing oil from burning in the combustion chamber.

Helps Keep Your Engine Clean

Over time, debris and sludge can build up inside an engine, leading to reduced efficiency and potential damage. The special additives in high-mileage oil help break down this buildup and keep the engine running cleaner for longer.

When High-Mileage Oil Might Not Be the Right Choice

While high-mileage oil has its benefits, it's not always the best option. For example:

If Your Engine Is Still in Good Condition

If your car isn't leaking and you're only using a quart of oil every 6,000 miles, you might not need high-mileage oil just yet. Stick with regular oil as long as everything seems to be working fine.

If You’ve Been Neglecting Maintenance

High-mileage oil can’t fix serious mechanical issues. If your car is losing power, making strange noises, or experiencing blowby, it might be time for a full inspection rather than just switching oil types.

Whether you need a simple oil change or more extensive repairs, DaSilva’s is here to help. Our team provides quality service at competitive prices. Call us today to schedule an appointment at our Naugatuck location.

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