The Best Weed Eater Oil – 2022 Edition

best oil for string trimmer

With summer rolling in, your yard may be due for a tune-up. Most homeowners put plenty of sweat and labor into their landscaping but struggle to maintain their equipment with the same attention to detail. 

Just like your car’s engine needs a special kind of oil, your Weed Eater needs lubrication to do its best work. However, not all Weed Eater oils are created equal.

What To Look For in the Best Weed Eater Oil

It may be tempting to settle for any oil with the Weed Eater branding on the label. But just like how different car engines need different types of engine oil, your Weed Eater has specific needs.

Where the two types of engines differ is that weed wacker fuel and oil are blended. When this is done incorrectly, it can have disastrous consequences. Carefully research what the appropriate ratio is for your machine.

Two-cycle air-cooled engines are small engines. Rather than have a separate fuel tank and oil tank, gasoline is mixed with oil. Two-cycle gas trimmers manufactured by Weed Eater use a 40:1 ratio of gasoline to weed wacker engine oil. Another common ratio is 50:1.

Four-cycle engines have separate oil and fuel tanks. Therefore, four-cycle engine oil is never to be mixed with engine oil.

How to Find the Ratio of Fuel to Oil For Your Weed Wacker

The ratio of gas to oil for a particular model may be printed on the fuel tank or gas cap. If in doubt, check the owner’s manual for your weed wacker to know what the manufacturer recommends. If you really can’t find any information, most engines take a 40:1 – 50:1 ratio. You may damage your weed eater if your oil ratio is off by too much, but you’ll probably be close if you stay in that range.

Can I Use Regular Gas?

Most small engines built today are able to handle unleaded gasoline. Ethanol additives can wreck havoc on older engines – and there’s still some debate on how long you should store 10% ethanol gas in your weed whacker. I try to burn through all the gas in my tool’s tank as quickly as possible to avoid the issues.

Can I Use Regular Oil?

No. Regular car engine oil is not formulated to be used in small, air-cooled engines like the ones on 2 cycle Weed Eaters. The weed whacker burns the oil, so it needs to be a different chemical composition than in non-two cycle engines.

For 4 cycle engines, it’s a different story. You are looking for a

Can Lawn Mower Engine Oils Be Used in a Weed Eater?

We like to recommend using oil specifically made for weed eaters. Often, it’s best to buy the manufacturer’s own product as it’s been tested in the product and deemed to work well.

That said, you can use other brands of 2-cycle engine oil in your string trimmer.

You’ll want to match your 4-cycle string trimmer viscosity needs to the oil that you buy.

The SASE (Society of Automotive Engineers) developed a scale in order to allow for comparisons among engine and transmission oils. We don’t need to go into tons of detail here on the subject.

What you need is

Some varieties of weed eater oil come with a fuel stabilizer as a component of the oil blend. The fuel stabilizer keeps the gasoline from degrading over time while stored within the equipment.

Most 4-cycle weed eaters use 30-weight oil. That means you are looking for something like 10W-30, 10-30,5-30, etc on the label. The front part is the temperature at which the oil will still flow (so 10W-30 works down to -10C).

I don’t know about you, but weed killing isn’t on my mind at those tempartures – so just make sure the second part of the number matches what you need.

And, as always, if the manual says something different – go with the manual! There are hundreds of models and engines on the market. This is not a one-size-fits-all solution.

JASO registrations indicate quality as determined by the organization known as JALOS. JALOS is the Japanese Automotive Lubricating Oil Society.

What Is the Difference Between Jaso FB, Jaso FC, and Jaso FD?

There are levels to JASO certification. JASO FB has a high lubricity rating, which means it can reduce friction. However, JASO FB does not have a smokeless formula.

JASO FC is as capable of lubrication as JASO FB, but JASO FC is also a low-smoke formula. JASO FD is a product with amazing features. It has a high detergency rating, meaning that it extends and improves engine life.


Best Weed Eater Engine Oils Compared

Arnold 2-Cycle Engine Oil 1-Mix 16 oz.
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Echo 6450001 Power Blend 1 Gallon Oil Mix 6 Pack
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Briggs and Stratton 100005 SAE 30W
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Briggs and Stratton 100074 Pack of (2) 1-Quart 5W-30 Synthetic Oil
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Best 2 Cycle Oils For Weed Eater String Trimmers Reviewed

As this kind of oil is intended for two-stroke engines, each of these products will need to be mixed with gasoline. Not all models will use the same ratio of oil to gasoline, so be certain to confirm the ratio for your equipment to ensure proper performance.

Best Overall 2 Cycle Trimmer Oil: Husqvarna XP+ 2 Stroke Oil 2.6 oz. Bottle 6-Pack

We like Husqvarna XP+ 2 Stroke Oil 2.6 oz. Bottle 6-Pack

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This two-cycle oil comes in a bottle ready to mix with gasoline. The common 50:1 ratio matches perfectly with a gallon of fuel to a single 2.6 oz bottle of 2-stroke oil. 

This 2-stroke engine oil runs on a VEF or Verified Engine Formula, making it clean-burning and unlikely to prompt the need for extra regular maintenance.

Why it’s a Great Option

This engine oil is an excellent option for two-cycle engines. It runs clear and strong. It includes fuel stabilizers to keep the fuel fresh once mixed. The size of the packs makes it very convenient to combine the motor oil with fuel. This oil is the best overall option for two-stroke engines.

Specifications

  • JASO Certification: JASO FD
  • Fuel Stabilizer: Yes, this product includes a fuel stabilizer.
  • Viscosity Rating: Synthetic oil blend

Runner Up For 2 Cycle Engines: Arnold 2-Cycle Engine Oil – 1-Mix 16 oz.

We like Arnold 2-Cycle Engine Oil  1-Mix 16 oz.

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The Arnold 2-cycle Engine is compatible with any ratio needed. This 2-cycle oil comes in a 16-ounce bottle. It comes with a Tip ‘n’ Measure plastic bottle for easy measuring and dispensing. 

The low smoke point makes it a great option for reducing the carbon deposits within your two-cycle engine.

Why it’s a Great Option

While this model is not as convenient as the oil that comes in small bottles ideal for instant mixing, the Arnold 2-cycle engine oil has an excellent rating, reducing the need for regular oil changes. 

It is also compatible with other equipment and can be used as lawn mower oil. Overall this motor oil is versatile, and a great option for Weed Eater brand small engines.

Specifications

  • JASO Certification: JASO FD
  • Fuel Stabilizer: Yes, this oil blend contains a fuel stabilizer.
  • Viscosity Rating: Advanced synthetic blend

Honorable Mention: Echo 6450001 Power Blend 1 Gallon Oil Mix 6 Pack

We like Echo 6450001 Power Blend 1 Gallon Oil Mix 6 Pack

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The Echo 6450001 Power Blend comes in 2.6 oz bottles, perfect for quick and easy blending motor oil with gasoline. This 2-stroke oil burns clean for optimal performance in your string trimmer. As a power blend, it is ideal for big jobs that require great horsepower.

Why it’s a Great Option

This oil is suitable for small engines. It comes in the perfect size for blending with gasoline. It is easy to use, easy to dispense, and makes prepping your string trimmer for use in a streamlined process. 

The Echo 6450001 Power Blend is a great option for any of your small motor landscaping equipment. However, unlike competitors, it does not have a fuel stabilizer.

Specifications

  • JASO Certification: JASO FC
  • Fuel Stabilizer: No, this two-stroke oil does not have a fuel stabilizer
  • Viscosity Rating: Semi-synthetic oil

Best 4 Cycle Oils For Weed Eater Weed Whackers Reviewed

There are many four-cycle engine oils available on the market. These represent our picks for the ones with the best versatility and performance.

Best 4 Cycle Weed Eater Oil: Briggs and Stratton 100005 SAE 30W Engine Oil – 18 Oz

We like Briggs and Stratton 100005 SAE 30W

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This Briggs and Stratton 100005 4 cycle engine oil is a high-quality option. It is formulated to combat the high operating temperatures often created by air-cooled engines. In addition, it is formulated to promote the greatest quality of life and life span for your string trimmer.

Why it’s a Great Option

This oil is a great option for four-cycle engines. It is a high-quality oil that works well in the high heat environment of a four-cycle air-cooled engine. This Briggs and Stratton engine oil is also versatile and should be compatible with any landscaping equipment with a large motor.

Specifications

  • JASO Certification: JASO FD
  • Fuel Stabilizer: Fuel is separate from oil in four-cycle engines.
  • Viscosity Rating: SAE 30W

Runner Up: John Deere Original Equipment Turf-Guard 10W-30 Oil

We like John Deere Original Equipment Turf-Guard 10W-30 Oil

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With a John Deere endorsement, it’s clear that this four-cycle engine oil is a great choice for your landscaping equipment. This John Deere TY22029 Turf-Gard Oil is formulated to protect your equipment and keep it running efficiently for years to come. 

As a result, lawn and utility equipment will experience greater longevity when using this licensed product.

Why it’s a Great Option

John Deere Turf-Gard Oil is high-quality 4-cycle engine oil that works in various machines. Lawnmowers, generators, tractors, and string trimmers can use this high-capacity oil. It has additives that make it compatible and safe for use with large air-cooled engines.

Specifications

  • JASO Certification: JASO FD
  • Fuel Stabilizer: Fuel is separate from oil in four-cycle engines.
  • Viscosity Rating: ‎10W-30

Honorable Mention: Briggs and Stratton 100074 Pack of (2) 1-Quart 5W-30 Synthetic Oil

We like  Briggs and Stratton 100074 Pack of (2) 1-Quart 5W-30 Synthetic Oil

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This Briggs and Stratton 100074 Synthetic oil is an excellent option for 4-cycle engines. You can use it in lawnmowers, string trimmers, and many other pieces of landscaping equipment.

Why it’s a Great Option

This oil is high-quality, but its viscosity rating makes it not quite as great an option compared to other products on the market. However, the Briggs and Stratton 100074 is still a solid choice for four-cycle engines. There will be only a slight difference in performance in high temperatures.

Specifications

  • JASO Certification: JASO FC
  • Fuel Stabilizer: Fuel is separate from oil in four-cycle engines.
  • Viscosity Rating: Synthetic, 5W-30

Final Thoughts

The most crucial element of choosing the appropriate oil for your Weed Eater brand string trimmer is ensuring that you are familiar with the needs of your equipment. 

Whether you are mixing oil and gasoline for a two-cycle engine or have separate tanks on a four-cycle engine, the best oil is the one that protects your equipment and maximizes safety. 

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