Best Starting Fluid for Lawn Mower (2026): 5 Picks
Five starting fluids for lawn mowers compared by engine type, cold limit, can size and pack, from a gasoline-only 2-pack to gasoline and diesel single cans.
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Top picks at a glance
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- 1
Best OverallGumout 5402689.5/10View on Amazon - 2
Best for Gasoline and DieselSTA-BIL 220049.5/10View on Amazon - 3
Best Cold WeatherLucas Oil 112389.4/10View on Amazon - 4
Best LubricityCRC 056719.4/10View on Amazon - 5
Best Basic PickJohnsen’s 67629.3/10View on Amazon - 6
STA-BIL Starting FluidView on Amazon - 7
CRC 05671-12PK Starting Fluid with LubricityView on Amazon - 8
6762 Starting FluidView on Amazon - 9
Johnsen's 6752 Premium Starting Fluid -10.7 ozView on Amazon - 10Johnsen's 6752-12PK Premium Starting FluidView on Amazon
A mower that will not fire on a cold morning makes choosing the best starting fluid for lawn mower use a practical question, not a brand question. Engine type comes first, because some fluids here are for gasoline engines only, while others list gasoline and diesel engines.
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Quick picks
- Best Overall Gumout 540268: Gasoline lawn mower fluid in a 2-pack of 11 oz cans Check price on Amazon
- Best for Gasoline and Diesel STA-BIL 22004: Gasoline and diesel fluid stated to work to -65 degrees F Check price on Amazon
- Best Cold Weather Lucas Oil 11238: Broad engine list, stated to perform to -65 degrees F Check price on Amazon
- Best Lubricity CRC 05671: Gasoline or diesel fluid with lubricity, effective to -65 degrees F Check price on Amazon
- Best Basic Pick Johnsen’s 6762: Basic 10.7 oz can with stated solvent and viscosity details Check price on Amazon
Our acreage picks
Gumout 540268 Starting Fluid for Gasoline Engines, 11 oz, 2 Pack
Starting fluid for gasoline engines, in a pack of 2 cans of 11 oz, for cold or humid starts, with upper cylinder lubrication and corrosion inhibition, as the listing states.
Read the full review
The Gumout listing gives a starting fluid for gasoline engines, in a pack of 2 cans of 11 oz, for extreme cold or humid weather. It states upper cylinder lubrication and corrosion inhibition, with a residue free special feature, and lists use for lawn mowers and other small gasoline equipment. It states the fluid is not for diesel engines.
Pros
- Lists lawn mower use among small gasoline equipment
- Pack of 2 cans of 11 oz
- Lubricates upper cylinders while inhibiting corrosion, as the listing states
- Residue free special feature, as the listing states
Cons
- Not for diesel engines
- No temperature figure stated, only extreme cold or humid use
- No concrete warranty term is stated
- No shelf life after opening is stated
STA-BIL 22004 Starting Fluid for Gasoline and Diesel Engines, 11 oz
Starting fluid for gasoline and diesel engines, in an 11 oz can, stated to work to -65 degrees F, with upper cylinder lubricant and corrosion inhibitors.
Read the full review
The STA-BIL listing gives a starting fluid for gasoline and diesel engines, in an 11 oz can, stated to work to -65 degrees F. It states an upper cylinder lubricant and corrosion inhibitors, and lists cars, trucks, motorcycles, tractors, marine engines, lawnmowers, snowmobiles and other equipment. It states products are good for use up to 2 years after the bottle was opened.
Pros
- Lists gasoline and diesel engines, including lawnmowers
- Stated to work to -65 degrees F
- Upper cylinder lubricant and corrosion inhibitors stated
- Listing states it will not harm catalytic converters or oxygen sensors
Cons
- No concrete warranty term is stated
- Single can only, no multipack stated
- Opened use is limited to 2 years, as the listing states
- No safety certification is stated
Lucas Oil 11238 Sure Start Starting Fluid, 10.7 oz
Starting fluid for passenger cars, diesel engines, lawn mowers and other small engines, with upper cylinder lubricant, stated to perform to -65 degrees F.
Read the full review
The Lucas listing gives a starting fluid for passenger cars, diesel engines, lawn mowers, chainsaws and outboard motors, in a 10.7 oz aerosol can, stated to perform to -65 degrees F, with an upper cylinder lubricant. Note a contradiction: the spec table lists a weight figure of 0.27 g and a container type of Bottle, while the listing describes a 10.7 oz aerosol can, so the can description is followed here.
Pros
- Lists lawn mowers, diesel engines and other small engines
- Stated to perform to -65 degrees F
- Contains upper cylinder lubricant, as the listing states
- Single 10.7 oz aerosol can, easy to store
Cons
- No concrete warranty term is stated
- No corrosion inhibitor is stated
- Spec table weight figure does not match the can size, so weight is not used here
- Single can only, no multipack stated
CRC 05671 Jump Start Starting Fluid with Lubricity, 11 oz
Starting fluid with lubricity for gasoline or diesel engines, in an 11 oz can, effective to -65 degrees F, with upper cylinder lubrication.
Read the full review
The CRC listing gives a Jump Start starting fluid with lubricity, for gasoline or diesel engines, in an 11 oz can, effective to -65 degrees F. It states it improves cold or humid starts, prolongs starter life and lubricates upper cylinders. The listing bullets do not name lawn mowers specifically, though the engine types cover gasoline and diesel equipment.
Pros
- Lists gasoline or diesel engines
- Effective to -65 degrees F, as the listing states
- Lubricates upper cylinders, as the listing states
- Listing states it prolongs starter life
Cons
- No concrete warranty term is stated
- No lawn mower mention in the listing bullets
- Single can only, no multipack stated
- No corrosion inhibitor is stated
Johnsen's 6762 Starting Fluid, 10.7 oz
Starting fluid in a 10.7 oz can, with a petroleum-based solvent, listed as a cold weather starting aid with upper cylinder lubricant.
Read the full review
The Johnsen's listing gives a starting fluid in a 10.7 oz can, with a petroleum-based solvent and low viscosity, SAE 0W, listed as a cold weather starting aid with upper cylinder lubricant. The listing gives far less engine and use detail than the other listings here, and no temperature figure is stated. Flash point is stated as -23.0 degrees Celsius in the listing.
Pros
- 10.7 oz can, as the listing states
- Petroleum-based solvent stated in the spec table
- Low viscosity, SAE 0W, stated in the spec table
- Upper cylinder lubricant listed among specific uses
Cons
- No temperature figure is stated
- Engine details are fewer than in the other listings here
- No concrete warranty term is stated, only a note to check with the manufacturer
- Single can only, no multipack stated
Other machines to compare
STA-BIL Starting FluidCheck price on Amazon
CRC 05671-12PK Starting Fluid with LubricityCheck price on Amazon
6762 Starting FluidCheck price on Amazon
Johnsen's 6752 Premium Starting Fluid -10.7 ozCheck price on Amazon- Johnsen's 6752-12PK Premium Starting FluidCheck price on Amazon
Side-by-side specs
| Model | Acre Score | Engine type | Can size | Cold limit | Warranty |
|---|---|---|---|---|---|
| Gumout 540268 | 9.5/10 | Gasoline only | 11 oz, 2 pack | Not stated | No term stated |
| STA-BIL 22004 | 9.5/10 | Gasoline and diesel | 11 oz | -65 degrees F | No term stated |
| Lucas Oil 11238 | 9.4/10 | Gasoline, diesel, lawn mowers | 10.7 oz | -65 degrees F | No term stated |
| CRC 05671 | 9.4/10 | Gasoline or diesel | 11 oz | -65 degrees F | No term stated |
| Johnsen’s 6762 | 9.3/10 | Automotive | 10.7 oz | Not stated | No term stated |
Specifications are manufacturer rated as listed, collected 25 October 2026.
Acreage and terrain fit
Gumout 540268
STA-BIL 22004
Lucas Oil 11238
CRC 05671
Johnsen’s 6762
Buying guide: best starting fluid for lawn mower
Gasoline only, or gasoline and diesel
Gumout states its fluid is for gasoline engines and not for diesel, while Lucas, STA-BIL and CRC list gasoline and diesel engines. Johnsen’s listing gives fewer engine details, so match the can label to the engine before buying. See the mower maintenance hub for related maintenance guides.
Cold limit
Lucas, STA-BIL and CRC state a cold limit to -65 degrees F, while Gumout states extreme cold or humid use without a temperature figure, and Johnsen’s listing states no temperature figure. A stated temperature figure is easier to compare than a general cold-weather claim, but it does not change the engine-type check.
Can size and pack
Gumout comes as a pack of 2 cans of 11 oz, while STA-BIL and CRC come as single 11 oz cans and Lucas and Johnsen’s come as single 10.7 oz cans. STA-BIL states its products are good for use up to 2 years after the bottle was opened, with the opened date marked on the package, while the other listings do not state such a period.
What listings do not state
None of the listings here states a safety certification or a concrete warranty term in years, so those factors do not separate the picks. Lucas also shows a spec table weight figure that does not match its can size, so weight is not used to compare that pick. Check the can label for engine type, can size and any warranty note before buying.
Read the manual, keep children and pets out of the yard while you work, wear eye and hearing protection and sturdy footwear, and never exceed the slope rating of your machine. Refuel only with the engine off and cool. See CPSC lawn mower safety. Read our Safety Disclaimer.
Matching It to Your Property
- For a mower stored in an unheated shed, a cold-rated fluid matches the cold-start problem.
- For gasoline mowers, a gasoline-only fluid fits, while diesel mowers need a fluid that lists diesel engines.
- For properties with both gasoline and diesel equipment, a fluid that lists both engine types covers both.
- Store cans where they stay clean and dry, and keep the opened date marked where the listing states to do so.
The Acre Score explained
The Acre Score weighs five factors: performance, build quality, value, safety and warranty. A factor the listing does not state scores zero, so no pick here earns safety or warranty points, because no listing states a safety certification or a concrete warranty term.
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Gumout 540268 | 9.5 | 32 | 21 | 22 | 0 | 0 |
| STA-BIL 22004 | 9.5 | 30 | 21 | 20 | 0 | 0 |
| Lucas Oil 11238 | 9.4 | 29 | 20 | 20 | 0 | 0 |
| CRC 05671 | 9.4 | 28 | 20 | 19 | 0 | 0 |
| Johnsen’s 6762 | 9.3 | 24 | 18 | 18 | 0 | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.
FAQ: mowing large lots
Why would a lawn mower need starting fluid?
Starting fluid is a cold-start aid for engines that will not fire in cold or humid conditions, not a repair for a mower that will not run for other reasons.
Which starting fluid suits a gasoline lawn mower, and which suits diesel?
Gumout is for gasoline engines and not for diesel, while Lucas, STA-BIL and CRC list gasoline and diesel engines, so match the can label to the engine type.
How cold can these starting fluids work?
Lucas, STA-BIL and CRC state effectiveness to -65 degrees F, while Gumout states extreme cold or humid use without a temperature figure and Johnsen’s states no temperature figure.
Does a 2-pack or a single can matter?
Gumout comes as a pack of 2 cans of 11 oz, while the other picks here come as single cans of 11 oz or 10.7 oz, so a pack gives a spare can without changing the fluid itself.
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