Best High Mileage Oil

Reviews & Buying Guide

Using a special oil for high mileage engines, you can significantly extend the engine’s life, and the car owner will be relieved of the need for an overhaul of the engine. As you know, during operation, a piston internal combustion engine is subject to certain wear. If you do not go into details, the piston rings, cylinder walls gradually wear out, the gaps between the mating parts increase.

Experienced car owners are well aware of the fact that worn out motors with high mileage will require special care, including the use of the correct lubricant. It will prevent further failure of the unit, the engine will not lose its power, and the car owner will be relieved of the need for complicated and expensive engine repairs. Let’s talk in more detail about what kind of oil is required for worn-out engines.

Best High Mileage Oil

High quality synthetic motor oil with a unique formulation for long engine life. MaxLife motor oil is specially formulated for high mileage engines. Specialty additives combat the underlying causes of engine breakdown and help reduce oil consumption. MaxLife extends engine life.

They are designed for gasoline, diesel and gas engines of passenger cars, delivery vans, light trucks, minibusses, caravans.

Key features:

  • Designed specifically for modern high mileage engines. A unique formulation with special additives that combat the leading causes of engine breakdown: leaks, deposits, sludge, and friction. The unique formulation of MaxLife engine oils extends engine life
  • Instant oil supply at low temperatures facilitates cold starts and optimal lubrication within seconds after ignition on
  • Additional cleaning additives reduce the formation of harmful deposits often found in high mileage engines
  • Strong oil film protects against wear under all operating conditions
  • Special conditioners protect the seals and help to reduce and even prevent oil consumption in high mileage engines.


  • Anti-wear agent
  • Contains rust inhibitors
  • Include detergents


  • The bottle design is poor
  • Not recommended for low mileage engines

Mobil 1 ™ is the world’s most popular synthetic motor oil brand delivering high performance and outstanding protection. Mobil 1 is formulated with a proprietary high performance synthetic base stock formulation fortified with a precisely balanced additive system.

It has high cleaning properties, prevents unwanted processes in the engine, and effectively protects against wear. Its viscosity is stable; it is not affected by external influences, temperature drops, and operating conditions. Simultaneously, the properties of the oil remain practically unchanged during the entire period of use, from replacement to replacement.

Key features:

  • Protection of the engine against wear and lubrication during the entire interval between oil changes
  • Excellent engine protection by preventing the build-up of harmful deposits
  • Improved cleaning technology for passenger cars with high mileage (over 100 thousand km)
  • Improved protection against the consequences of using fuel of unstable quality;


  • Additives for protection
  • Longer lifespan


  • Expensive
  • Not famous in cleaning

Castrol GTX high mileage synthetic

Castrol GTX is formulated to protect your motor under severe operating conditions. Mineral oils and semi-synthetic of this series prevent the formation of carbon deposits and oily deposits. Sludge build-up makes it difficult for the oil to circulate, leading to premature wear and damage to engine parts. 

The GTX Double Action formula is a double-action, which is provided by a particular composition of additives. They ensure the destruction of already accumulated soot layers and prevent sludge formation. 

Therefore, this series of motor lubricants are best used for engines with high mileage – from 100 thousand km or more. It will extend the engine’s operation and save money on regular repairs, which are provoked by deposits and changes in the friction of parts. It has additives to reduce deposits, oil burns, and leaks.


  • Improve fuel economy
  • Reduce oil burn and other deposits


  • The bottle is not opaque
  • Not best for cleaning

Pennzoil Platinum High Mileage engine oils are specially formulated for engines with a range of 75,000 miles (125,000 km). The oil base is obtained from natural gas using a technology that took 40 years to develop and launch.

Include special additives to reduce the likelihood of leaks and restore the elasticity of gaskets in used cars. Pennzoil Platinum High Mileage keeps pistons up to 20% cleaner than requires the most stringent industry standards. It provides outstanding wear protection against friction.

Pennzoil High Mileage Mineral Oil reduces the leaks and oil consumption by sealing the high mileage engine cracks and leak points. It also helps the engine against low-speed pre-ignition effects in modern engines.

Key features:

  • For high mileage engines
  • Contain sealing agents
  • Excellent wear protection


  • Acts as a sealing agent
  • Protection against wear


  • Little expensive

Royal Purple High Mileage Motor Oil

Royal purple high mileage motor oil is famous in this category. It is one of the best-selling oil available for various engines that offers wear resistance properties to the engine and reduces engine deposits. It offers quality and reliability to stand out as the best high mileage oil available in the market.

It is synthetic oil available in the market developed by Royal purple, founded in Texas, which offers the best lubricants to the customers.

Key features:

  • Reduce engine deposits
  • Corrosion resistance


  • Resistance to low temperature
  • Improves engine efficiency


  • Little expensive

What Is Meant By High Mileage Oil?

First, let’s try to understand the terminology. What is commonly understood as a worn-out engine? Previously, this was much simpler – if the engine ran more than three hundred thousand kilometers, then such a unit was already worn out, requiring the use of special oil and appropriate care. However, today, when many automakers use highly accelerated units, such engines’ resource has significantly decreased. Therefore, such a powerful and, at the same time, small displacement engine will be considered worn out even after 200 thousand kilometers.

Special oils for engines with high mileage

Special oils, which are intended for use on engines with significant mileage, can reduce friction between the crankshaft, cylinders, and pistons. The use of special additives makes it possible to solve the problem of starting a car in cold weather, which is ensured by the low-temperature pumpability of the lubricant. The presence of special additives allows you to flush carbon deposits, slags, and deposits from the engine walls. It significantly improves the performance of the motor.

Old engines often have problems with corrosion. Therefore, high mileage oils for worn-out cars has improved performance in protecting the unit from corrosion. Regular use of such oil removes any contamination, and the internal elements shine as if the engine had just left the assembly line. You can choose such a lubricant for both atmospheric and turbocharged engines, and engines running on gasoline or diesel.

Engine Oil Types: Synthetic or Natural?

The classification of engine oils begins with determining how the base lubricant component is obtained – the base. There are three types: mineral, synthetic, and semi-synthetic.

Mineral oils are obtained by refining petroleum to get a product with the required characteristics. It is one of the first ways to get mineral lubricants. At the same time, no matter how perfect the distillation of oil, a small percentage of impurities remain in the oil: sulfur compounds, active hydrocarbons, rapidly oxidizing components. The problem with mineral oils is higher viscosity and lower resistance to low temperatures. The advantage is the creation of a thicker oil film required for vehicles with high mileage.

Synthetic oils are produced by industrial synthesis, which provides a high-quality product that does not require additional purification. Compared to mineral ones, they withstand low temperatures much better, have high stability at overheating, have better detergent and anti-corrosion properties, and do not contain foreign impurities that create varnish deposits in engine. Synthetic oils are recommended for new cars and are filled in at the factory.

Semi-synthetic oils are a compromise option used as a replacement for mineral oils for engines with high mileage. It is a mixture of mineral (up to 2/3) and synthetic (1/3) oils, which has improved characteristics (especially fluidity in the cold). The addition of synthetic components makes it possible to improve performance by order of magnitude with a minimal difference in price.

Synthetic vs. high mileage oil: Synthetic oils, as artificial, contain chemicals and additives, which are also present in high mileage oils, but the difference lies in use. High mileage oils are intended for high mileage and old engines, while synthetic oils can be used for both used and new engines.

Why Use High Mileage Oil In old Engines ?

To understand the engine with high mileage and to choose the right composition, the principle of lubricating the engine must be known. It is particularly important if the car has high mileage.

In the engine that works for a long time, the details start to wear out.

First of all, it’s about the cylinder-piston group. Its wear influences the compression and thus reduces the fuel efficiency of the engine. More fuel is required to maintain the same dynamics. In such situations, the transition to synthetic oils is permissible because they have higher temperature resistance and evaporate more slowly. Their composition ensures better compression – such a film makes it possible to reduce the adverse effects of wear and normalize fuel consumption

When the cylinder-piston system is worn out, the number of combustion products from the chamber into the crankcase also increases. The composition under the influence of high temperature and interaction with aggressive substances starts to oxidize (mainly if the driver uses cheap oil and fuel), leading to a loss of the additives’ effectiveness. The engine collects combustion products, and corrosion occurs in it. Synthetic oils offer protection against oxidation – better and longer than organic ones.

Synthetic oils help to solve the “cold start” problem of the engine. The temperature characteristics of such lubricants allow working with a cold system – their higher fluidity than that of an organic and the lower viscosity at low temperatures. This enables the crankshaft and other parts of the fuel system to perform their role more efficiently. Synthetic oils save fuel at the start and make it faster. Also, starting the engine before warming up is one of the main reasons for rapid wear.

 It is known that all motors have several wear levels:

  • Working time
  • Stable condition
  • Emergency condition

Engines with high mileage are close to the emergency state – wear develops like a snowball, which makes a rapid breakdown inevitable. Special additives have been designed for such engines, which are added to the engine oil. They have an anti-wear booster that allows you to increase the thickness of the oil film, which protects the parts and separates moving surfaces. This technology offers the best protection against wear. In this case, friction losses due to a decrease in viscosity are reduced within acceptable limits.

In other situations, fuel consumption increases many times over, and performance drops. Some engine oils contain additives that prevent the formation of deposits. They also allow you to wash off the existing sediment. The active ingredients of the additives remain in the oil and remain on the walls of the mechanisms. The use of synthetic oils makes it more economical to dispense the same volume that has to be refilled less often.

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