7 Best Synthetic Oil for 5.7 Hemi

There are not many engines in the world that could match the prowess and performance of the legendary 5.7 Hemi. Offered in rugged vehicles like GMC and Cadillac, it is nothing less than a juggernaut. …

Best Synthetic Oil for 5.7 Hemi

There are not many engines in the world that could match the prowess and performance of the legendary 5.7 Hemi. Offered in rugged vehicles like GMC and Cadillac, it is nothing less than a juggernaut.

Needless to say that every engine requires regular care and maintenance to stay fit, and a machine like the 5.7 Hemi needs even more of it. General Motors recommends that you always use synthetic oils, as it is the most important fluid that your engine needs.

With so many options in the market and deceptive marketing trends, you could be misled into using the wrong type of oil and you cannot afford that with an engine like 5.7 Hemi.

Best Synthetic Oil for 5.7 Hemi – Comparisons

ProductViscosityUsed TechnologySpecial AdvantagePrice
Valvoline Advanced Full Synthetic Oil5W–20SynPowerImproved Engine AccelerationCheck on Amazon
Castrol GTX Magnatec Synthetic Oil5W–20Intelligent MoleculesSuperb Wear ReductionCheck on Amazon
AmazonBasics Full Synthetic Motor Oil5W–20AdvancedVehicular Maintenance SupportCheck on Amazon
Castrol EDGE Advanced Full Synthetic Oil5W–20Fluid TitaniumWithstands Heavy Pressure

Check on Amazon

Pennzoil Platinum Full Synthetic Motor Oil5W–20PurePlusPiston Cleaning AbilityCheck on Amazon
Mobil 1 Advanced Full Synthetic Motor Oil5W–20High Mileage Increased Cleaning PowerCheck on Amazon
Castrol GTX Ultraclean Motor Oil5W–20TrishieldIndustry Standard CleanlinessCheck on Amazon

To help you get the best out of your 5.7 Hemi and keep it firing perfectly on all cylinders, we have compiled a list of 7 Best Synthetic Oil for 5.7 Hemi. So go through this detailed guide and treat your dear engine with the best that it deserves.

Top 7 Best Synthetic Oil for 5.7 Hemi

No matter which oil you go for, make sure you pick one from the list below and always choose a synthetic oil This type of oil offers perfect lubrication, engine temperature maintenance, optimal performance and reduces oil change frequency as well. So, here are the 7 best synthetic oil for 5.7 Hemi;

1- Valvoline Fully Synthetic Motor Oil

Product Description

To meet all the minimum standard requirements of the mighty 5.7 Hemi, this fully-synthetic oil is well formulated and is a perfect fluid for NA or forced induction motors.

It has a much more efficient and refined formulation than most competitors and is a perfect match for high-performance engines.

It is made using highly refined additives that offer better lubrication and temperature resistance, along with perfect wear resistance for thousands of miles before replacement. Irrespective of the climate and weather conditions, this synthetic oil with advanced technology would offer perfect starts and optimal performance for your 5.7 Hemi engine.

Features and Benefits

Superb Protection

Its high-quality additives offer superb lubrication that protects the engine and its 5w-20 grade is well-suited for all types of weather. With this oil circulating inside your 5.7 Hemi, you wouldn’t have to worry about repairs or any damage.

Advanced Formulation

Its premium Synpower technology has premium ingredients and additives that ensure optimal starts in winter and the flawless performance that it ought to give. Whether you live in Florida or Alaska, just get inside your RAM drive tension-free.

Enhanced performance

This fully synthetic oil also keeps the engine clean by reducing the harmful byproducts, and it also neutralizes the acids which enhance the performance. You’d feel a noticeable difference after getting this motor oil for your Hemi engine.


1. Compatibility with almost all fuel types.

2. Reduces sludge and contaminants inside.

3. Superb acceleration and output.

4. Adequate viscosity for perfect flow to all engine parts.


1. Pouring it can be sometimes tricky.

2- Castrol GTX Magnatec Synthetic Oil

Product Description

Castrol needs no introduction when it comes to motor oils and lubricants and GTX Magnatec is a prime example of that. This fully synthetic oil has premium additives in it and highly advanced formula to breathe extra life into your 5.7 Hemi engine.

Its unique flow properties and sludge reduction are ideal for high-performance motors and if you’re searching the market for something versatile, this might be the perfect choice for you.

It also has a 5W-20 Viscosity which is better suited for different temperature ranges and is ideal for cold starts. Its formulation has protective properties which reduce engine wear and protect the seals, preventing leakage and heat damage.

Features and Benefits

Optimal Engine Protection

It requires less time to warm up and reduces friction between moving parts when running at higher RPMs. This ensures an enhanced lifespan and better performance with improved fuel efficiency.

Advanced Molecular Formula

Castrol uses functional oil molecules which improve lubrication of all the engine components, improving start-up and running for longer change intervals.

Suitable for Urban Usage

If you spend the majority of your time stuck in traffic and have urban usage, it requires smoother inner coating and GTX Magnatec ensures your 5.7 Hemi gets that aptly.


1. Dramatically improves performance and output.

2. Forms a protective coating with its advanced molecular formula.

3. Reduces engine wear.

4. It has a viscosity well-suited for most weather conditions.


1. Density can sometimes become very thin.

3- AmazonBasics Fully Synthetic Motor Oil

Product Description

If you’re looking for the best engine oil for your Ram 1500, then look no further than this AmazonBasics motor oil which comes with a fully-synthetic formulation and is an upgrade over conventional oils.

Its peculiar formula offers ideal wear and corrosion resistance which prevents rusting and other time-related damage to the high-performance engine like your 5.7 Hemi.

It has a 5W-20 viscosity rating which has perfect lubrication and is considered a universal grade. Cold starts and scorching summers won’t be a problem anymore with this motor oil lubricating your engine.

You will also get longer change intervals with AmazonBasics synthetic motor oil, prolonging engine life and increase fuel efficiency.

Features and Benefits

Ideal Protection

Its highly protective qualities prevent the buildup of any corrosive elements and reduced the wear of moving parts as well. This enhances the lifespan of your heavy-duty engine while keeping its output intact.

Highly Advanced Formulation

It has a highly purified formulation and uses premium additives which reduce friction among the moving parts and forms a coating on all the surfaces for durability. Its 5W-20 formulation is also well-suited for any weather or climate conditions.

Ideal Fuel Efficiency

As this oil prevents any sludge deposits and gets rid of harmful contaminants, the fuel burns perfectly and your engine gives its maximum output, offering perfect fuel economy.


1. Optimal protection of all engine parts.

2. Requires very less maintenance support and has longer change intervals.

3. Increased fuel economy and better engine output.

4. Reduces wear and corrosion.


1. There is no visibility strip on the packaging.

4- Castrol Edge Advanced Fully Synthetic Motor Oil

Product Description

Another great lubricant by Castrol, the Edge Advanced motor oil is a fully synthetic blend of premium viscosity and offers enhanced wear protection.

If you’re looking for engine oil that matches all the manufacturer’s requirements and enhances your 5.7 Hemi engine’s output, this premium oil is the best choice for you. Thanks to its Fluid Titanium technology, it offers corrosion resistance and wear protection like no other motor oil.

No matter if you’ve high output requirements or operate your RAM 1500 truck at higher RPMs, this oil will keep its viscosity intact and offer better performance than you enjoyed before. The moving parts inside the engine get better lubrication and surface coating with Castrol Edge motor oil.

Features and Benefits

Superb Functionality

Castrol enriched their Edge motor oil with Fluid Titanium technology that enhances the engine’s compatibility with most fuel types and increases its efficiency. It also promotes optimal engine functioning by keeping the mechanism hurdle-free.

Near-Perfect Protection

Engine wear and corrosion are reduced by the optimal layering of all the surfaces with a protective additive and this premium motor oil also keeps the friction minimal, ensuring ideal temperature maintenance.

High-Quality Formulation

One of the most premium oils on the market feature a top-quality formulation. Thanks to the Fluid Titanium technology and high-quality manufacturing, the engine’s lifespan gets a boost and so does the fuel efficiency. It is also ideal for rugged engines like your 5.7 Hemi and other similar motors.


1. Premium blend of additives and the latest technology.

2. Ensures enhanced performance.

3. Reduced corrosion of metal parts and increased efficiency.

4. Helps the engine tackle the pressure in a better way and respond aptly to stress.


1. Oil gets dirty and changes its color drastically during the change interval.

5- Pennzoil Platinum Fully Synthetic Motor Oil

Product Description

Another great lubricant on our list of best synthetic oil for 5.7 Hemi is the Pennzoil Fully Synthetic motor oil. It is truly unique and is derived from natural gas processing rather than conventional crude oil refinement.

Through a unique manufacturing process, its PurePlus technology offers better lubrication and enhanced wear protection under different driving conditions.

When you change your oil, you won’t find any contaminants or sludge inside your engine, thanks to its highly effective cleaning properties. It also matches most requirements set by car manufacturers and your Ram 1500 would love to have this lubricant for optimal output.

Features and Benefits

Superb Cleaning Properties

Its premium additives and PurePlus technology imparts superb cleaning properties and keeps the inside of your high-performance engine clean and contamination-free.

Better Fuel Economy

Reduced friction and better temperature maintenance mean better fuel efficiency and your 5.7 Hemi also idles better when not moving.

Enhanced engine Output

When there is no sludge buildup and seals are well protected inside the engine, it would definitely enhance its performance and Pennzoil ensures it keeps your Ram 1500 firing perfectly on all cylinders.


1. Flawless wear protection and corrosion resistance.

2. Much better fuel economy than before.

3. No sludge and contaminant buildup inside the engine.

4. Enhanced PurePlus technology and premium additives for better performance.


1. Not compatible with all the vehicles and you must consult before using it in your engine.

6- Mobil 1 Advanced Fully Synthetic Motor Oil

Product Description

If you have a high mileage RAM or GMC truck and you want to prevent it from aging any further, this might be the best choice for your veteran truck. Mobil 1 makes our list of 7 best synthetic oil for 5.7 Hemi for a reason and it’s the quality and heritage we all trust.

This lubricant protects the inside of the engine with its premium ingredients and forms a protective coating, especially on all the moving components to reduce wear and friction, prolonging its life and overall economy.

With Mobil 1 Fully Synthetic oil, you won’t have to worry about engine degradation due to poor fuel quality and its 5W-20 grading keeps your engine smooth in all weather conditions.

Features and Benefits

Reliable Engine Protection

This oil keeps the sludge formation at a minimum and in case there are any contaminants in the engine, it will aptly get rid of them. This along with better wear protection ensures that your engine lasts another lifetime.

Advanced Formulation

Its powerful additives make sure that you don’t need any extra coating for your engine parts and your high mileage truck with the 5.7 Hemi engine doesn’t limp or go low on adrenaline. This is a perfect choice for high-mileage motors and is a very reliable option for older model trucks.

Better Coverage and Serviceability

Its 5W-20 rating is well-suited for the majority of regions and ensures optimal engine performance. You also get to enjoy longer change intervals with Mobil 1, thanks to its Fully Synthetic properties.


1. Premium formulation and additives for better protection

2. Longer oil change intervals

3. Perfect for high mileage engines

4. Protects the seals and other weak points inside the engine.


1. Not the first choice for forced induction engines (supercharged/turbocharged).

7- Castrol GTX Ultraclean Motor Oil

Product Description

The best feature that separates this oil from other oils on the list is its immaculate engine cleaning properties. Although other lubricants are quite good as well, this oil takes it even further and offers 45% better cleaning and wear protection.

The Trishield technology uses special protective agents that stick to the moving engine parts and reduce friction and wear, irrespective of how you drive and which fuel you prefer.

Fuel economy and performance would get a huge upgrade with this oil and that’s why it is on our list of best synthetic oils for 5.7 Hemi.

Features and Benefits

Corrosion and Wear Resistance

Thanks to its unique Trishield technology, it offers excellent wear protection to your 5.7 Hemi and ensures that its lifespan is enhanced.

Efficient Action and Formulation

It resists changes in viscosity and keeps the sludge formation at a minimum, offering added protection to your engine.

Better Economy

You’ll definitely get better fuel economy and have lesser trips to the gas station once you start using Castrol Ultraclean in your Ram 1500.


1. Reliable protection and reduced engine wear.

2. Unique sludge busting and removal formula.

3. Extended engine life with better fuel economy.

4. Industry-standard cleaning efficiency.


1. Although it is 5W-20 rated, it is relatively thinner than other oils.

What to Look for When Buying the Best Synthetic Oil for 5.7 Hemi?

When you go looking for engine oils, you’d be amazed by the variety of products, and it’s utterly confusing as well. You don’t want to go wrong here and must be very careful about certain criteria when picking the motor oil for your 5.7 Hemi. Let’s understand those;

Car Specifications

Every car manufacturer has certain criteria of engine oil for their engines, based on some engine specifications, such as fuel type, compression ratio, and injection mechanism.

Before you go for an oil change, must consult the owner’s manual and be particular about your car’s specifications.

Oil Grade and Viscosity

Oil grade, as per SAE, is defined by how the engine oil’s viscosity responds to different temperatures. The grade is written as XW-XX, where X specify numbers, and the numbers on left define response to cold temperatures and the right ones to hot temperatures. The lower the left and higher the right, the better the coverage of your engine oil for most weather conditions.

5W-20 is considered the universal oil grade and most engines work fine with this grade.

Formula and Additives

Though your engine oil should have bare minimum additives and a high-quality advanced formula, for better engine protection and wear resistance. Having too many chemicals and additives could also damage the seals and other parts of your powertrain. So it is advisable that you stick to the manufacturer’s recommendations and don’t fall for something fancy.


This is the most common mistake that car owners do! They ignore what’s written on the box and don’t read the labels. This leads to the selection of the wrong type of oil and messes up your car’s performance. Always read what’s written on the labels and oil packaging for surety.


Q1- Which motor oil is best for my 5.7 Hemi?

Fully Synthetic oil is the ideal choice for a high-performance engine like a 5.7 Hemi. Valvoline fully synthetic motor oil should be your first pick and our recommended oil.

Q2- Are Fully Synthetic better than Conventional oils?

Due to highly efficient and advanced formula, and premium additives, fully synthetic oil is better in all aspects than conventional oil. It offers better wear resistance, reduced friction, better temperature response, and longer oil change intervals.

Q30 How often should I change the oil in my 5.7 Hemi?

As per manufacturer recommendations, you should ideally change the oil every 7000 miles or 8 months in your 5.7 Hemi.

Final Thought

Engine oil is the most important lubricant in your car and has a direct influence on its output and economy. According to experts, fully synthetic oil is the most preferred option for all cars, especially high-performance motors like 5.7 Hemi. Your 5.7 Hemi that rocks your RAM 1500 would not be able to work or breathe efficiently with cheap, low-quality motor oils, and it must be fed what it deserves.

Based on industry reviews and expert opinions, we think that Valvoline Full Synthetic 5w20 Motor Oil is the best synthetic oil for 5.7 Hemi and should be your first pick. It is a fantastic blend of premium additives and formulation with useful characteristics. You’ll receive everything in one package, including a significant decrease in wear and corrosion, a protective covering, reduced friction, and four times smoother functionality with increased fuel efficiency.