Best Four-Stroke Engine Oil of 2025

Bryan Hicks Avatar
Bryan Hicks
Last Updated: Jan 6, 2025

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Four-stroke engine oil is a crucial component for the smooth and efficient operation of any four-stroke engine. This type of oil is specially formulated to provide superior lubrication, reduce wear and tear, and protect the engine against corrosion and deposits. Four-stroke engine oil is designed to work with a wide range of engines, from motorcycles and ATVs to lawn mowers and generators. It comes in various grades and viscosities, ensuring that there is a suitable product for every application. With the right four-stroke engine oil, users can extend the life of their engines and enjoy optimal performance and fuel efficiency.

At a Glance: Our Top Picks

Briggs & Stratton SAE 30W Oil Cover #TOP 1
Briggs & Stratton SAE 30W Oil
ftb score rating icon 9.9
Valvoline 4-Stroke Marine Oil Cover #TOP 2
Valvoline 4-Stroke Marine Oil
ftb score rating icon 9.8
Ariens 00091000 4 Cycle SAE 5W30 Sno Thro Oil 16oz Cover #TOP 3
Ariens 00091000 4 Cycle SAE 5W30 Sno Thro Oil 16oz
ftb score rating icon 9.6

Top 10 Four-Stroke Engine Oil

#TOP 1

Briggs & Stratton SAE 30W Oil

100005
Pack of 2
Briggs & Stratton SAE 30W Oil Cover
Briggs & Stratton 100005 SAE 30W Engine Oil - 18 Oz (Pack of 2)

The Briggs & Stratton Engine Oil is a high-quality SAE 30W oil designed specifically for air-cooled engines. It performs exceptionally well at higher operating temperatures, ensuring your engine runs smoothly. By using this oil, you can maintain the performance and longevity of your Briggs and Stratton equipment. This OEM oil guarantees a perfect fit, which is essential for optimal engine function. With this specially formulated oil, you can have peace of mind knowing that your engine is protected and performing at its best.

What We Like
High-quality formulation
Designed for air-cooled engines
Ensures engine longevity
Perfect fit for equipment
#TOP 2

Valvoline 4-Stroke Marine Oil

899557-EA
1 QT
Valvoline 4-Stroke Marine Oil Cover
Valvoline 4-Stroke Marine Full Synthetic Engine Oil 1 QT

Valvoline Marine Engine Oil is designed to meet the demanding needs of 4-stroke marine engines. It offers enhanced wear protection, ensuring your engine remains safe even under extreme heat and high RPMs. With up to eight times better rust defense, this oil protects your engine from moisture exposure, whether it's in use or stored away. Its formulation is tailored specifically for marine motors, providing the durability and performance necessary in harsh conditions. This premium full synthetic oil gives you peace of mind, knowing your engine is well-protected and ready for action.

What We Like
Strong wear protection
Excellent rust defense
Engineered for marine motors
Full synthetic formula
#TOP 3

Ariens 00091000 4 Cycle SAE 5W30 Sno Thro Oil 16oz

00067600
Ariens 00091000 4 Cycle SAE 5W30 Sno Thro Oil 16oz Cover
Ariens 00091000 4 Cycle SAE 5W30 Sno Thro Oil 16oz by Ariens

The Ariens 00091000 4 Cycle SAE 5W30 Sno Thro Oil 16oz by Ariens is a high-quality four-stroke engine oil specifically designed for snow blowers. With its OEM Part Number 00091000, it replaces the original oil with ease. This 5W-30 snowblower oil offers excellent lubrication and protection for your snow blower's engine, ensuring smooth operation in cold weather conditions. The Ariens Sno Thro Oil is formulated to withstand the extreme temperatures and demands of snow blowing, providing optimal performance and extending the life of your snow blower. Its compact 16oz size makes it convenient to store and use whenever needed. Trust Ariens, a trusted brand in outdoor power equipment, to keep your snow blower running at its best.

What We Like
High-quality lubrication
Easy replacement for original oil
Optimal performance in cold weather
#TOP 4

Husqvarna 4-Stroke Mower Engine Oil

593153502
Husqvarna 4-Stroke Mower Engine Oil Cover
Husqvarna 32-oz 4-Cycle SAE 30 Mower Engine Oil 593153502

Husqvarna 4-Stroke Mower Engine Oil is an ideal size for 2hp - 5.5hp mowers and most air cooled 4-stroke engines. This SAE 30 oil exceeds API SJ specifications, ensuring the best performance for your mower.

What We Like
Perfect size for 2hp-5.5hp mowers and most air cooled 4-stroke engines.
Exceeds API SJ specifications, ensuring the best performance for your mower.
Easy to use and pour with the 32-oz container.
#TOP 5

Valley Industries 4-Cycle Engine Oil

PK-85490002
White
Valley Industries 4-Cycle Engine Oil Cover
Valley Industries Pressure Washer Premium 4-Cycle Engine Oil - 1 Liter

The Valley Industries Premium Oil is specially designed for 4-stroke engines, including pressure washers and other gas small engines. This high-quality SAE 10W-30 oil is formulated to extend the life and performance of your pressure washer engine. With its easy fill neck, you can conveniently add oil to your engine without any hassle. The one-liter size provides enough oil for multiple uses. Not only is this oil suitable for pressure washers, but it can also be used for other gas small engines. Just make sure to read the manufacturer's manual for proper usage. Keep your engine running smoothly and efficiently with Valley Industries Premium Oil.

What We Like
Designed for 4-stroke engines
Extends engine life and performance
Easy fill neck
#TOP 6

Briggs & Stratton Snow Thrower Oil

100030C
multi
Briggs & Stratton Snow Thrower Oil Cover
Briggs & Stratton 100030C SAE 5W-30 4-Cycle Snow Thrower Oil - 32 Oz.

This 32 oz. bottle of Briggs & Stratton 100030C SAE 5W-30 4-Cycle Snow Thrower Oil is designed to keep your snow thrower engine running smoothly. The model number is 100030C and the item package dimensions are 8.8" x 4.2" x 2.4". This four-stroke engine oil is the perfect solution for your snow thrower needs.

What We Like
Keeps your snow thrower engine running smoothly
32 oz. size is convenient for storage and use
Designed specifically for four-stroke engines
#TOP 7

Valvoline 4-Stroke Marine Oil

899557-CS
1 QT, Case of 6
Valvoline 4-Stroke Marine Oil Cover
Valvoline 4-Stroke Marine Full Synthetic Engine Oil 1 QT, Case of 6

Valvoline Marine Engine Oil is designed to provide exceptional protection for your 4-stroke marine engine. It offers significantly enhanced wear protection, ensuring that your engine can handle extreme heat and high RPMs. You can also count on its superior rust defense, which guards against moisture damage whether your engine is running or stored. This oil is specifically formulated to meet the unique needs of marine motors, delivering reliable performance in tough conditions. With its premium full synthetic formula, you can trust that your engine will remain durable and efficient, no matter the environment.

What We Like
Strong wear protection
Excellent rust defense
Engineered for marine use
Synthetic formula for durability
#TOP 8

Husqvarna 4-Cycle Engine Oil 593153504

593153504
Husqvarna 4-Cycle Engine Oil 593153504 Cover
Husqvarna 32-oz 4-Cycle 5W-30 Synthetic Blend Engine Oil 593153504

This semi-synthetic 5W-30 4-stroke oil is designed for most 2-stage 4-stroke snow blowers. It provides superior cold temperature performance and exceeds API SJ specifications.

What We Like
Improves engine performance in cold temperatures
Meets or exceeds API SJ specifications
Designed for most 2-stage 4-stroke snow blowers
#TOP 9

Toro 38280 Engine Oil

38280 x 2
Toro 38280 Engine Oil Cover
Toro 38280 (Pack of 2) SAE 10W30 4-Cycle Oil Quart

The Toro 10W30 Oil is a high-quality engine oil designed specifically for gasoline 4-cycle engines. It provides excellent engine protection across a broad range of temperatures, ensuring your engine runs smoothly in various conditions. Made from premium base stocks and additives, this oil helps to extend the life of your engine by reducing wear and tear. With a 2-quart pack, you have more than enough oil for your maintenance needs, making it a convenient choice for any engine owner. By using this oil, you can enhance your engine's performance and reliability.

What We Like
Excellent engine protection
Wide temperature range
Premium base stocks
Convenient 2-quart pack
#TOP 10

Exmark 135-2566 Full Synthetic Engine Oil 3 Pack

135-2566
Exmark 135-2566 Full Synthetic Engine Oil 3 Pack Cover
Exmark 135-2566 Engine Oil 10W-30 Full Synthetic Quart Bottle 3 Pack

This engine oil is a genuine Exmark Toro factory part number 135-2566, which is a 10W-30 full synthetic quart bottle. It is a replacement for the previous part number 116-3373. This product is designed specifically for four-stroke engines, providing maximum protection and performance.

What We Like
Genuine Exmark Toro factory part
Full synthetic engine oil for maximum protection and performance
Designed specifically for four-stroke engines
Buying Guide Image

Four-Stroke Engine Oil Buying Guide: What You Need to Know

Four-stroke engines are the most common type of engine found in cars and trucks today. They are also used in a number of small engines, such as those found in lawnmowers and generators. If you have a four-stroke engine, it is important to use the right kind of oil to ensure optimum performance and longevity. Here are a few tips on how to choose the best Four-Stroke Engine Oil for your needs:

  1. Check your owner's manual. This is the best place to start when choosing oil for your car or truck. The manufacturer will usually recommend a specific type of oil, based on the climate and driving conditions in your area.
  2. Consider your driving habits. If you do a lot of stop-and-go driving or operate your vehicle in extreme temperatures, you may need a different type of oil than someone who mainly drives on highways.
  3. Look for an oil that meets or exceeds the standards set by the American Petroleum Institute (API). Oils that meet these standards have been independently tested and proven to be effective in four-stroke engines.
  4. Be sure to choose an oil with the correct viscosity rating for your engine. This rating can be found on the side of the motor oil bottle and indicates how thick or thin the oil is at various temperatures.
  5. Follow the recommended oil change interval specified by your vehicle's manufacturer. Depending on your driving habits, this interval can range from every 3,000 miles to every 7,500 miles. By changing your oil regularly, you can help extend the life of your engine and keep it running smoothly.

Frequently Asked Questions (FAQs)

1. Is 4-stroke oil the same as engine oil?

4-stroke engine oil is different from 2-stroke oil. While 2-stroke oils burn with the fuel, 4-stroke oils circulate around the engine. They lubricate moving engine parts, disperse heat, and remove impurities. Therefore, they contain different ingredients than 2-stroke oils.

2. Does a 4-stroke need special oil?

Yes, 4-stroke engines require specific oil for proper lubrication. Use 4-stroke oil in 4-stroke engines and 2-stroke oil in 2-stroke engines. The oil is necessary to ensure smooth operation, lubrication of engine parts, heat dispersal, and removal of impurities.

3. Is 5W 30 oil the same as 4-stroke?

Yes, SAE 5W-30 is a type of 4-stroke multi-grade oil. It is suitable for use in 4-stroke engines and provides the necessary lubrication and protection.

4. Is 10w40 a 4-stroke oil?

Yes, 10W-40 is a type of 4-stroke oil. It is a semi-synthetic formulation designed for use in high-performance air and water-cooled 4-stroke engines, including motorcycles and other high-revving engines.

5. Is SAE 40 4-stroke oil?

Yes, SAE40 oil can be used as a high-quality 4-stroke motorcycle engine oil. It is specially formulated to provide consistent protection and maintain uniform viscosity throughout the oil's lifespan.

6. Can you use 10W30 instead of 4-stroke oil?

Yes, 10W30 oil can be used in 4-stroke engines. There is no difference between 4-stroke oil and regular engine oil; they are the same. Common engine oils used in lawnmowers and other equipment include SAE30, 5W30, and 10W30.

7. Can I use 10W30 in a 4-stroke engine?

Yes, 10W30 oil is suitable for many 4-stroke motorcycles, including those with wet clutches. It can also be used in motorcycles with a separate gearbox and clutch assembly as a gear oil, as long as the manufacturer recommends a 10W-30 engine oil for this application.

Editor's Notes

During our four-stroke engine oil research, we found 24 four-stroke engine oil products and shortlisted 10 quality products. We collected and analyzed 6,011 customer reviews through our big data system to write the four-stroke engine oil list. We found that most customers choose four-stroke engine oil with an average price of $17.88.

The four-stroke engine oil are available for purchase. We have researched hundreds of brands and picked the top brands of four-stroke engine oil, including Briggs & Stratton, Valvoline, Ariens, Husqvarna, Valley Industries. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Written by
Bryan Hicks Avatar

Bryan Hicks is a professional gardener and a writer who lives in North Texas with his family and his dog. Bryan has spent more than half of his life surrounded by garden products. He has extensive experience in garden makeovers and maintenance and lawn care. His areas of expertise include outdoor decoration, gardening and garden design.