Safe Filling, Transport And Storage Practices For A Jerry Can In Your Vehicle

By Mike

Certified Professional Automotive Mechanic – Owner and Editor of VehicleRuns

Last Updated: June 24, 2026

A Jerry can is one of the most useful accessories a driver can keep for emergencies, off-road travel, lawn equipment refueling, or long-distance trips where fuel stops may be limited. But carrying extra fuel inside or on a vehicle also creates real risks if the container is filled incorrectly, left unsealed, exposed to heat, or stored in the wrong place.

Good Jerry can safety comes down to a few simple habits: use the right can for the fuel, avoid overfilling, keep the container upright and secured during transport, and store it away from ignition sources and excessive heat. For DIY car owners, following these basics helps prevent leaks, vapor buildup, damaged interiors, and dangerous fire hazards.

Start With the Right Jerry Can for the Job

Not every fuel container is built for every liquid or every type of vehicle use. Before filling a Jerry can, make sure it is intended for the fuel you plan to carry and that it is in good condition with no cracks, rust-through, swollen sides, damaged seams, or worn cap seals.

• Use a container clearly rated and labeled for gasoline, diesel, or kerosene as applicable.
• Check that the cap, gasket, venting system, and spout all fit properly and seal tightly.
• Do not use an old can with visible corrosion, deformation, or a history of leaking fumes.
• Avoid mixing fuel types in the same container unless it has been properly emptied and cleaned for that specific use.

If you carry a Jerry can regularly, label it clearly so there is no confusion during roadside use. A can used for gasoline should never be mistaken for diesel, mixed fuel, or water storage.

Best Practices When Filling a Jerry Can

Fill It on the Ground, Not in the Vehicle

When filling at a gas station, place the Jerry can on the ground instead of leaving it in a trunk, pickup bed liner, cargo tray, or trailer. This helps reduce static buildup and lowers the chance of ignition while filling.

Leave Room for Expansion

Do not fill the container to the absolute top. Fuel expands as temperature rises, especially in a hot vehicle or under direct sun. Leave the recommended headspace noted by the container manufacturer so pressure does not force fuel or vapors out of the cap.

Avoid Spills and Fumes

Use a compatible nozzle or spout, fill slowly near the end, and stop immediately if fuel backs up or splashes. After filling, wipe any drips off the can and make sure the cap is fully tightened. Even a small amount of spilled gasoline can leave strong vapors inside the vehicle.

• Turn the engine off before refueling.
• Keep cigarettes, lighters, and open flames away from the fill area.
• Do not use cell phone chargers, portable heaters, or other spark-producing devices nearby.
• If fuel gets on your hands, gloves, or clothing, clean up before loading the can into the vehicle.

How to Transport a Jerry Can Safely in Your Vehicle

The safest way to transport a full Jerry can is upright, sealed, and firmly restrained so it cannot tip, slide, bounce, or rub against sharp edges. The goal is to prevent both liquid leakage and vapor release while driving.

Keep the Can Upright and Secured

Use tie-down straps, a dedicated mount, a cargo divider, or a snug storage position that prevents movement in turns, sudden stops, or rough road conditions. A Jerry can that shifts around can damage the cap, chafe against metal, or spill if it falls onto its side.

Choose the Best Vehicle Location

Exterior-mounted or well-ventilated cargo areas are generally better than the passenger cabin. If the can must ride inside an SUV, hatchback, or cargo area, keep windows cracked when practical, minimize trip time, and remove the can as soon as you reach your destination. Never place a filled fuel can loose on a seat, floorboard, or where it can be hit by passengers or cargo.

• Best option: approved exterior mount or secured truck bed position away from impact points.
• Acceptable short-term option: upright in a separated cargo area, firmly restrained.
• Avoid: passenger compartment, hot trunk next to electrical gear, or anywhere near tools that can puncture the can.

Protect Against Heat

Heat increases vapor pressure and can worsen leaks or fumes. Do not leave a filled Jerry can baking in direct sunlight or in a closed vehicle for long periods. If you are stopping for meals, shopping, or overnight stays, move the container to a safer storage location as soon as possible.

Storage Rules at Home and in the Garage

A Jerry can should not live in your daily driver full-time unless there is a genuine need and the setup is designed for it. For home storage, move fuel to a cool, dry, well-ventilated area away from living spaces and ignition sources.

• Store the container upright on a stable surface.
• Keep it away from water heaters, furnaces, dryers, space heaters, pilot lights, and battery chargers.
• Do not store fuel in a basement, utility closet, or attached living space where vapors can accumulate.
• Keep it out of direct sunlight and away from temperature extremes when possible.
• Make sure children and pets cannot access the storage area.

If fuel will sit for an extended period, follow the fuel manufacturer’s guidance on age and stabilization. Old fuel can degrade, create starting issues in equipment, and may no longer be safe or effective for intended use.

Common Mistakes That Create Safety Problems

Most Jerry can incidents come from small avoidable errors rather than dramatic failures. Paying attention to these common mistakes goes a long way toward safer ownership.

• Overfilling the can and leaving no space for expansion.
• Using a damaged cap, missing gasket, or ill-fitting spout.
• Transporting the can on its side or loose in the cargo area.
• Leaving a filled can inside a hot vehicle all day.
• Using an unlabeled container and accidentally mixing fuels.
• Ignoring the smell of fumes and assuming the cap is fine.
• Refilling generators, mowers, or other hot equipment immediately after shutdown.

If you smell fuel inside the vehicle, stop and inspect the can before continuing. A strong vapor smell is a warning sign, not something to put off until later.

What to Do if a Jerry Can Leaks or Spills

If you notice leaking, dripping, or heavy fumes, act quickly and carefully. Do not keep driving for long with an active leak inside the vehicle.

1. Pull over in a safe area away from traffic and ignition sources.
2. Turn the engine off and keep smoking materials, sparks, and open flames far away.
3. Move passengers away from the area if fumes are strong.
4. If it is safe to do so, remove the can from the vehicle and place it upright on the ground.
5. Contain or clean minor surface spills using appropriate absorbent material and local disposal rules.
6. Do not reuse the container until you identify whether the cap, gasket, seam, or body is the source of the problem.

If a large spill occurs, or if fuel reaches upholstery, wiring, or a hot component, seek professional help and follow local emergency guidance. Gasoline vapors can ignite far more easily than many drivers realize.

Practical Everyday Tips for DIY Car Owners

For most drivers, the safest approach is to carry a Jerry can only when it is actually needed. Treat it as a temporary-use tool, not permanent cabin cargo.

• Inspect the can before every trip for cap seal condition, dents, and odor.
• Carry a rag or absorbent pad in a sealed bag for minor drips during fueling.
• Use gloves when handling fuel to reduce skin contact and transfer inside the vehicle.
• Ventilate the cargo area if the can rode inside, then remove it promptly on arrival.
• Rotate stored fuel responsibly so it does not sit forgotten for too long.
• Replace aging containers before they fail instead of waiting for the first leak.

A well-made Jerry can is only part of the equation. Safe filling habits, proper restraint, and smart storage decisions are what make carrying backup fuel practical instead of risky.

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FAQ

Is It Safe to Carry a Full Jerry Can Inside an SUV or Car?

It is safer to use an exterior mount or truck bed when possible. If a filled Jerry can must ride inside a vehicle, keep it upright, tightly sealed, firmly secured in the cargo area, and remove it as soon as possible to reduce fume and spill risk.

How Full Should a Jerry Can Be?

Do not fill it completely to the brim. Leave the expansion space recommended by the container manufacturer so fuel can expand with heat without forcing liquid or vapors out of the cap.

Can I Leave a Filled Jerry Can in My Vehicle All the Time?

That is not a good habit for most daily drivers. Heat, pressure changes, and vibration increase the chance of fumes, leaks, and container wear. Carry fuel only when needed and move it to proper storage when the trip is over.

Where Should I Store a Jerry Can at Home?

Store it upright in a cool, dry, well-ventilated area away from living spaces, direct sunlight, pilot lights, heaters, and other ignition sources. Keep it out of reach of children and pets.

What Should I Do if I Smell Gasoline From the Jerry Can While Driving?

Pull over safely, turn off the engine, and inspect the can right away. Check for a loose cap, damaged gasket, overfilling, or a leak. Do not continue driving for long with strong fuel fumes inside the vehicle.

Can I Use the Same Jerry Can for Gasoline and Diesel?

It is best to dedicate each container to one fuel type and label it clearly. Mixing fuels, even by accident, can damage engines or equipment and create expensive cleanup problems.

Why Should the Can Be Placed on the Ground when Filling?

Placing the can on the ground helps reduce static electricity risk during fueling. Filling a portable fuel container while it sits in a vehicle or truck bed can increase ignition risk.