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If you want to get high mileage out of your vehicles, every mechanic will tell you to use synthetic motor oil. There is a good reason for this suggestion. Petroleum can only be refined so much to prevent sludge from forming in your motor. Synthetics can be manufactured to avoid that kind of buildup in your system, which is why they are so highly recommended.
Which are the best synthetic motor oils you can use?
We have a list of the top 10 best synthetic motor oils for you to browse and compare, as well as a buying guide at the end of this article.
- Top 10 Best Synthetic Motor Oils In 2021 Reviews
- 1 Mobil 1 120764 – Old Faithful
- 2 Valvoline Synpower 0W-20 – For Better Fuel Efficiency
- 3 Castrol 03084 Edge 5w-30 – Oil Under Pressure
- 4 Rotella T6 Synthetic Diesel Motor Oil – For Trucks And Motorcycles
- 5 MAG1 Full Synthetic 5w-30 – Turbo Engine’s Best Friend
- 6 Liqui Moly 2041 Premium 5W-40 – The Oil For Oil-Burners
- 7 Pennzoil Platinum 5w-30 – Oil’s Best Kept Secret
- 8 Royal Purple 5w-20 – High Price/High Performance
- 9 Valvoline High Mileage With Maxlife Technology – Leak Sealer
- 10 Schaeffer Supreme 9000 – Burn-Proof Oil
- Best Synthetic Motor Oils: Buyer’s Guide
Top 10 Best Synthetic Motor Oils In 2021 Reviews
1 Mobil 1 120764 – Old Faithful
Mobile is a trusted US brand when it comes to motor oils. You can expect quality synthetic oil and excellent performance with Mobile, one of the best synthetic motor oils.
Like all the best synthetic motor oils, it helps prevent deposits and keeps sludge from building up in your engine. The lubrication qualities synthetic oil keep your internal motor parts from wearing down so fast. It works well in both hot and cold temperatures, and all of these qualities Hope your fuel economy.
The only complaint on the reviews has been about receiving shipments of the product. Sometimes bottles leak or are otherwise improperly sealed for shipment. If you get this from a dealer that will not be a problem.
2 Valvoline Synpower 0W-20 – For Better Fuel Efficiency
Valvoline is another favorite brand for synthetic oil. It is one of the best synthetic motor oils from North American manufacturers. This synthetic oil keeps your engine clean and offers excellent sludge protection.
Valvoline works well in both high and low temperatures, keeping your engine running in all climates. Additionally, it keeps your vehicle running at optimum fuel efficiency.
In short, you will find that Valvoline SynPower meets the requirements of nearly all standard North American vehicles. However, some reviews claim that Valvoline does not keep their engines quite as clean as Mobil 1 synthetic oil products.
3 Castrol 03084 Edge 5w-30 – Oil Under Pressure
Castrol is another brand of the best synthetic motor oils. This oil offers protection for vehicles that work under more pressure than usual. The EDGE 5W-30 is tested and meets the requirements for many GM, Ford, Honda, Chrysler, and other vehicles.
With Castrol, you can expect reduced engine friction and decreased engine deposits. Unfortunately, Castrol does not have as much mileage as Royal Purple and other synthetic oils. It will need to be changed more often.
4 Rotella T6 Synthetic Diesel Motor Oil – For Trucks And Motorcycles
If you are looking for a synthetic motor oil for your diesel engine, than Rotella T6 may be the best synthetic motor oil for you. Reviews show that this synthetic oil is not good only for diesel trucks, it also works well for motorcycles.
Rotella adds life to your engine and protects the internal workings of your vehicle. Additionally, it protects your motor against soot, dirt, and other substances that can contaminate your engine. This synthetic diesel motor oil maintains its viscosity and keeps your engine at optimal oil pressure.
As long as you are using Rotella T6 in diesel engines, there are no downsides listed among reviewers.
5 MAG1 Full Synthetic 5w-30 – Turbo Engine’s Best Friend
MAG1 is one of the best synthetic motor oils for turbo engines. This 5W-30 oil reduces the wear on your engine by 56% compared to standard oils. Also, it is the leading OEM viscosity grade, which gives you optimal fuel economy.
MAG1 provides resistance to cold start wear, but it is best used in warmer climates. Over time, this full synthetic oil breaks down in cold weather.
6 Liqui Moly 2041 Premium 5W-40 – The Oil For Oil-Burners
Do you have a car that seems to burn through oil? If so, this is probably the best of synthetic motor oils for you. It is recommended for European automobiles and provides them a high level of protection from wear.
Liqui Moly works in both high and low temperatures, providing fast oil delivery even in the coldest temperatures. It also keeps your engine clean from dirt and dust particulates that can build up and cause friction and plugs in your motor.
7 Pennzoil Platinum 5w-30 – Oil’s Best Kept Secret
According to one reviewer, the biggest problem with Pennzoil is their marketing. Details and specifications for their products are often difficult to come by. However, we have listed here the vehicle oil types that it can be used with.
- Chrysler MS-6395
- Ford WSS-M2C929-A, WSS-M2C946-A
- GM 6094M, 4718M, Dexos1
- Honda/Acura HTO-06
- APO SN-RC and all previous categories
- ILSAC GF-5
- ACEA A1/B1-10, A5/B5-10, A1/B1-12, A5/B5-12
Pennzoil comes highly rated for engine performance and fuel economy. Their synthetic motor oil operates well under extreme temperatures and keeps engines from losing their horsepower. Also, it protects your motor from friction and oxidation.
8 Royal Purple 5w-20 – High Price/High Performance
This high-performance synthetic motor oil is one of the best synthetic motor oils on the market. Reviewers rave about the protection and fuel efficiency afforded by Royal Purple products. Their 5W-20 full synthetic oil, like many of their products, is compatible with fuels containing ethanol to prevent corrosion.
Royal Purple protects your expensive catalytic emission systems. Although it costs more than other brands, it lasts longer and provides better service on your vehicles. It is also one of the most compatible brands of all synthetic motor fluids.
9 Valvoline High Mileage With Maxlife Technology – Leak Sealer
This Valvoline synthetic oil is one of the best synthetic oils on the market for one particular reason. It stops oil leaks in aging vehicles. Most oils, both regular and synthetic, only lubricate and potentially clean your engine. The MaxLife Valvoline oil actually works to slow leaks to a standstill, giving your vehicles a longer life.
This oil is not expensive and works great. Some reviewers claim it does not work for vehicles that require Dexos approval though, so be sure to check the specifications to ensure that it will work for your vehicle before you purchase it.
10 Schaeffer Supreme 9000 – Burn-Proof Oil
Schaeffer produces the longest lasting of the best synthetic motor oils. The Supreme 9000 does not burn off over time. When you change your oil, you can expect the same amount to come out that you initially put in.
Since it is so durable, you can expect it to last longer between changes. Most reviewers recommend changes between 5,000 to 8,000 miles.
The only downside to this oil is that it is more expensive than others.
Best Synthetic Motor Oils: Buyer’s Guide
The Schaeffer Supreme 9000 is the most durable of the synthetic oils, due to its protection against burning off over time. That factor alone puts it ahead of all other synthetic motor oils. The Supreme 9000 is made for gasoline engines.
Another good option for gasoline engines is the Liqui Moly 2041 Premium Synthetic Motor Oil. Like the Schaeffer Supreme 9000, it is manufactured specifically for motors that have problems burning through oil.
If you are looking for a durable version of the best synthetic motor oils for diesel engines, look at the Rotella T6 Synthetic Diesel Motor Oil.
Among the best synthetic motor oils listed above, the ones rated as the best at cleaning and keeping your engine clean are Mobile 1, Liqui Moly, and Royal Purple.
Mobile 1 is the cheaper of the three options and most available. Liqui Moly is more difficult to find. Royal Purple is on par with or just above Liqui Moly in cleaning ability but is more expensive.
Whichever synthetic oil you choose, check the specifications to make sure that it will work in your vehicle.
Value can be tricky when it comes to comparing the best synthetic motor oils. First, you must factor in which of these oils will work in your vehicle. The Rotella, for instance, is the top oil for diesel engines on this list. Most of the other options are for Gasoline engines.
The second variable you need to consider is how often you drive your vehicle. If you do not drive often, a cheaper option, like Mobile 1 or Valvoline offers great performance for your money. On the other hand, if you drive your vehicle a lot, you will find the need to change your oil more often cutting into the lower cost of the oil overall. In that case, you would be better off with oil like Schaeffer or Royal Purple.
If you have an older vehicle and are concerned about leaks, the Valvoline High Mileage with MaxLife offers an extraordinary ability to help seal leaks and stop new leaks from occurring with your vehicle. After all, if you are leaking oil, it does not matter how good the quality is, you will be consistently losing it.
We have listed the best synthetic motor oils above, given their general specifications, and offered some general advice in choosing a brand that fits your vehicle best. However, each vehicle model is slightly different, and some vehicles require particular oil types to function correctly. Make sure you take the time to check your own vehicle specs and compare them to the oil options above.
In general, vehicles that are driven less can get by with less expensive oils. However, if you often drive or drive great distances at a time, you will save money in the long run by purchasing a more expensive, more durable synthetic motor oil.