Amazon Basics Full Synthetic vs Mobil 1 Extended Performance High Mileage

Engine oils, the lifeblood of your engine, are of various types: conventional, full synthetic, semi-synthetic, and high mileage oils. Conventional oils are manufactured from crude oil after being extracted from the ground using traditional drilling methods. This type of oil is suitable for older engines.

Full synthetic oils are manufactured entirely in a lab using chemical compounds and can be used in both older and modern engines

Semi-synthetic engine oils give you some of the benefits of full-synthetic oils and use a blend of high-quality and low-quality conventional base oils or all high-quality base oils. Semi-synthetic oils can be used in trucks, vans, and SUVs operating under moderate driving conditions.

High-mileage oils are best suited for high-mileage engines. By high-mileage engines, we mean they have over 75000 miles on their odometer. They are designed to care for older engines.

In this write-up, we will compare Amazon Basics full synthetic motor oil with Mobil1 Extended performance high mileage oil. Amazon Basics is best known for its attractive price tag. It gives you all the benefits of high-end motor oil as it boasts API SN PLUS (highest rating in America), ILSAC GF-5 or GF-4, and GM dexos1 Gen2  license.

Mobil1 extended performance high mileage delivers high performance by providing maximum protection to high-mileage vehicles for 20000 miles and extends the lifespan of vehicles with more than 75000 miles. Along with providing protection during long service intervals, this oil comes with active cleaning agents to keep your engine free of sludge and contaminants.

Amazon Basics vs Mobil 1 High Mileage

SpecsAmazon Basics Full synthetic motor oilMobil 1 High Mileage Extended Performance
Oil TypeFull syntheticHigh Mileage
Engine TypeGasolineGasoline
Available Viscosity GradesSAE 5W30, 5W-20, 0W-20 and 0W-400W-20, 5W-20, 5W-30
APIAPI SN PLUS, SN, API SN Plus Resource Conserving, API SM, or SLAPI SJ, API SL, API SM, API SN, API SN PLUS, API SN PLUS Resource Conserving, API SN Resource Conserving, API SP, and API SP Resource Conserving
GMExceeds GM dexos1 Gen 2 specificationsDoes not have GM license
Oil Change Frequency10000 miles20000 miles
AdditivesDetergent and anti-wear additivesDetergent, seal conditioners, and anti-wear additives
ACEANot rated for European vehiclesACEA A5/ BF-16

Viscosity Comparison

Amazon Basics Full synthetic is available in SAE 5W-30, 5W-20, 0W-20, and 0W-40 viscosity grades, whereas the Mobil1 Extended Performance High Mileage features SAE 0W-20, 5W-20, and 5W-30 viscosities.

Amazon basics available grades of viscosity

Oils carrying viscosity grades of  SAE 5W-20, 0W-20 are suitable for use in modern gasoline-powered vehicles, SUVs, passenger cars, light vans, and trucks.

mobil 1 EP HM

5W-30 is recommended for use in light-duty petrol and diesel engines, cars, and SUVs. It is compatible with high-performance turbocharged and supercharged engines.

Similarly, a 0W-40  can be used in cars, pickup trucks, and in European vehicles like Volkswagon,  Porsche, and Mercedez- Benz.

Oil Type:

Amazon Basics is full synthetic motor oil. Made up of highly refined base oils, Amazon Basics is uniformly designed molecule by molecule to meet the needs of your modern engine. Amazon Basics motor oil can be used in new and old engines, and in vehicles that have a turbocharged or supercharged engine.

Mobil1 Extended Performance High mileage is manufactured using a proprietary blend of high-performance synthetic base stocks. As it is a high mileage oil, it extends the life of vehicles with more than 75000 miles on the clock.

 Mobil1 extended performance high mileage shouldn’t be used in new engines as being a high-mileage oil, it is specifically designed to address the problems faced by an older engine like leaking seals, excessive oil consumption, smokes, and emissions.

Comparing Additives:

Engine oil additives are blended into base oils to enhance the lubrication properties of the base oil and reduce undesirable properties like friction and sludge deposits.

Both Amazon Basics full synthetic and Mobil1 High Mileage extended performance contains various anti-wear and cleaning (detergents) additives to improve overall engine performance. Anti-wear additives found in Amazon Basics 5w-30  and Mobil1 High Mileage Extended Performance 5W-30: Boron, phosphorous, Molybdenum, and zinc compounds.

Detergents found in Amazon Basics and Mobil1 High Mileage extended Performance: Calcium and magnesium compounds

Engine Performance:

Reduction of Sludge built up:

Causes of Sludge Build-up:

Sludge is a tar-like substance or residue that can deposit on the engine because of :

  • Delay in changing your oil can turn your clean oil into dirty sludge which reduces the lubricating properties of the oil
  • The breakdown or oxidation of oil at high temperatures leads to pollutants gather in the oil causing the build-up of sludge on engine components.
  • Reduced circulation of oil caused by excessive idling and short trips.

The deposit of sludge, dirt and hard layers of grime impedes proper lubrication of the moving parts and clog oil passages. The presence of a blend of calcium and magnesium compounds in Amazon Basics and Mobil1 Extended Performance High Mileage acts as a detergent and prevents the formation of sludge on metal parts of the engine like piston rings, fuel injectors, cylinders, and valves.

Engine seals shrink over time. The seal conditioners present in Mobil1 Extended performance High Mileage puffs up the older seals and gives them a new appearance.

Minimizing Engine Wear

Amazon Basics and Mobil1 extended performance contain boron, molybdenum, phosphorus, and zinc compounds which act as anti-wear additives to protect the engine from wear and tear caused by metal to metal contact. The Sequence IVA engine wear test performed on Mobil 1 Extended Performance High Mileage proves that it provides unsurpassed wear protection to critical engine components.

The by-products of the combustion process like sulphuric acid corrode the metal of the pistons, cylinders. TBN number measures the alkaline concentration present in a lubricant. The TBN number of Mobil1 extended performance high mileage and Amazon Basics full synthetic is 8.6 and 8.34, respectively.

The high TBN number of Mobil1 Extended Performance High Mileage indicates that its alkaline additives do a better job than Amazon Basics full-synthetic in neutralizing the acidic materials, preventing corrosion, and extending the life of the engine oil.

Oil Change Frequency

Oil changing

The oil change interval of Amazon Basics full synthetic is 10000 miles, whereas with Mobil1 Extended Performance High mileage you can go as far as 20000 miles between services. This is quite impressive as Mobil1  saves you money at the pump by extending the oil drain intervals by more than 10000 miles.


To sum up, both Amazon Basics and Mobil 1 Extended Performance High Mileage oil are top-quality engine oils that offer optimum performance and make sure your car runs like a dream. We have provided you with an exhaustive comparison between the two premium oils so that you can choose a motor oil that best meets your engine needs. However, before choosing an oil for your engine, always consult your vehicle manufacture’s manual.

If you are on a budget and want a motor oil that delivers high performance with a reasonable price tag, go for Amazon Basics Full synthetic oil.

Mobil1 Extended Performance High Mileage, though pricier than Amazon Basics, delivers value for money by extending oil drain intervals and offering engine protection for up to 20000 miles.