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The five-star AmazonBasics High Mileage Motor oil (51520) meets the need for high mileage engines as it features seal rejuvenating properties and helps to prevent leaks.
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Pros
- Rejuvenates hardened seals.
- Prevents leakages.
- Restores the performance of high mileage engines.
- Better wear protection.
- Resistant to viscosity and thermal breakdown.
Cons
- The bottle is inconvenient.
- There is no visibility strip to help estimate the amount of oil you put in the engine.
- Expensive.
What we like
Has your engine enjoyed more than 75,000 miles? AmazonBasics high mileage motor oil meets the needs of such engines. It withstands the high temperatures in a high mileage engine to guarantee an extended drain interval.
The seals of a high mileage engine have been hardened. Conventional oils perform well in a high mileage engine as they are thick and do not leak. But they dissipate fast and don’t offer the best performance.
Although AmazonBasics has a lighter viscosity it comes with seal rejuvenating properties and prevents leakages. It also reduces friction between the various moving parts restoring the performance of your engine.
Most high mileage engines are not environment friendly. A lot of exhaust emissions characterizes them although this synthetic oil eliminates the contaminants in the engine and reduces exhaust emissions.
Meets the requirements of:
- Dexos1 Gen 2
- ILSAC GF-5
- API SN
With these you do not have to worry about it voiding your warranty and also comes with a convenient handle for easy usage.
What we do not like
The cost of the high mileage engine is high.
It does not have a visibility strip. It is, therefore, a challenge estimating the amount of oil you pour into the engine.
AmazonBasics Full Synthetic High Mileage motor oil Review
- For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
- Ideal for engines over 75,000 miles and for longer drain intervals
AmazonBasics is the ideal oil for engines that have done 75,000 miles and above. You can use it to top up the engine’s oil levels or for a complete oil change.
The synthetic oil is environment friendly as it reduces exhaust emissions. It is also reusable which minimizes the oil wastes in the environment.
Who is AmazonBasics High mileage motor oil for?
If your vehicle has seen 75,000 miles and above, then AmazonBasics is for you. High mileage engines are prone to friction and wear. This synthetic oil provides enhanced protection against wear and tear.
You can also use the high mileage oil if your vehicle doesn’t have a defined maintenance history. The high mileage oil will help restore its power. It will also clean the deposits in the engine to rejuvenate it.
Overview of features
AmazonBasics high mileage motor oil provides a protective layer around the moving components of the engine. This reduces friction between the metal parts which wastes away useful energy. By preventing the wastage of energy, the oil makes your engine more powerful.
AmazonBasics high mileage motor oil restores the performance and power of the high mileage engine.
Also the high mileage engine is prone to deposits and sludge build-up. This is due to the friction between the moving components. The oil comes with superior cleaning agents that eliminate all deposits and prevent sludge formation. You, therefore, enjoy a clean and healthy engine with better performance.
What’s more? Engines that have done 75,000 miles and above generate a lot of heat and you need an oil that will act as a coolant to cool them off. AmazonBasics synthetic oil absorbs the heat from the engine to cool it off.
The synthetic oil also resists breakdown in high temperatures and you can enjoy long-distance drives with your vehicle with no worry. The oil will still provide optimal protection, even when the engine is hot.
Old engines are also prone to contaminants due to friction and you may have a lot of exhaust emissions from the engine. AmazonBasics reduces friction in the engine, thereby minimizing the contaminants while reducing exhaust emissions.
It is also resistant to rust and corrosion that reduces the lifespan of your engine. Its viscosity allows for an easy and smooth startup of your engine, even in cold weather. This synthetic oil meets the requirements of API SN, ILSAC GF-5, and Dexos1 Gen2.
How to use it
With proper use AmazonBasics offers the best protection to an engine that has done 75,000 miles and above. The oil extends the drain interval of your engine as it does not break down in high temperatures.
You can use the oil by tapping up the levels in your engine or having a complete oil change. However, mixing it with other oils may affect its performance and durability and you should have a complete oil drain to enjoy the best performance and protection.

Alternatives to AmazonBasics high mileage synthetic oil
Valvoline high mileage oil
If you do not have access to AmazonBasics synthetic oil, Valvoline high mileage oil comes in as a worthy alternative.
The synthetic oil also meets the needs of engines with over 75,000 miles coverage. It provides enhanced protection against wear and tears in the engine. It forms a protective layer that reduces the metal to metal contact between the engine parts.
It is also resistant to viscosity change in severe conditions. This ensures protection for your engine in high temperatures and pressure. The oil is also rust-resistant and prevents the formation of acids in the engine.
Royal Purple 51520 high-performance synthetic oil
Royal Purple high-performance oil is also a worthy option to use. The oil brings back the power of the high mileage engine by keeping it clean. A clean and healthy engine will perform better and have fewer emissions.
Royal Purple is also compatible with other oils, including conventional ones. Therefore, you do not have to drain the current oil in the engine. Just top up using Royal Purple synthetic oil. The best thing is that Royal Purple will enhance the performance of the old oil in the engine.
It is also corrosion and rust-resistant and has strong shear stability.
- For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
- Ideal for engines over 75,000 miles and for longer drain intervals
Conclusion
AmazonBasics is an excellent oil for use in an engine with over 75,000 miles. The synthetic oil restores the power of the old engine by reducing the friction between moving parts. It also keeps the engine clean and healthy and reduces exhaust emissions.
Frequently Asked Questions
Should I use synthetic oil in a high mileage engine?
Nothing stops you from using synthetic oil in an old engine. However, unlike conventional oils synthetic oils are light and slippery and are prone to leakages when used in an old engine.
If you want to use synthetic oil in an old engine, go for one with seal rejuvenating properties. This will rejuvenate the hardened seals and prevent leaks.
Synthetic oil in an old engine is better than conventional oils. It restores the performance of the engine and offers better protection.
Is AmazonBasics High Mileage motor oil fully synthetic?
Yes, it is.
It has been formulated with chemicals and additives to meet the needs of your high mileage engine. It offers enhanced protection to engines over 75,000 miles.
What factors should I consider before buying a high mileage oil?
There are several factors that you should put into consideration before buying an oil for your high mileage engine.
For instance consider the viscosity. High mileage oils have a higher viscosity with enhanced shear stability. The properties enable the oil not to lose its form even when the engine temperatures are high.
You should also consider the anti-wear protection properties. High mileage engines are prone to friction and wear. As such, you should get oil with superior additives that prevent friction. The oil forms a protective coating on the engine parts to prevent metal to metal contact.
Can I mix AmazonBasics high mileage motor oil with the current oil in the engine?
AmazonBasics’ high mileage motor oil is highly compatible with other oils, including conventional oils. Thus, you can mix it with the current oil in your engine. When you combine the two, AmazonBasics improves the performance of the new oil.
On the other hand, mixing the two may alter the performance of AmazonBasics. It may affect its durability and performance.
Is the high price of AmazonBasics worth it?
Although the oil costs you a lot, it ends up saving you a lot.
First, it provides better protection for your engine. You, therefore, enjoy fewer trips to the maintenance shop. The enhanced fuel efficiency also saves you more at the fuel pump.
The Review
AmazonBasics High Mileage Motor Oil
AmazonBasics is an excellent oil for use in an engine with over 75,000 miles. The synthetic oil restores the power of the old engine by reducing the friction between moving parts. It also keeps the engine clean and healthy and reduces exhaust emissions.
PROS
- Rejuvenates hardened seals.
- Prevents leakages.
- Restores the performance of high mileage engines.
- Better wear protection.
- Resistant to viscosity and thermal breakdown.
CONS
- The bottle is inconvenient.
- There is no visibility strip to help estimate the amount of oil you put in the engine.
- Expensive.
Last update on 2023-06-07 / Affiliate links / Images from Amazon Product Advertising API