Can You Put Diesel or Kerosene in a Gas Can?

The short version

A fuel can is just a sealed container built to hold flammable liquid. Diesel and kerosene are less volatile than gasoline, so a can made for gasoline handles them without trouble. The plastic and metal are not the issue.

The issue is what happens afterward. A can that has held more than one fuel is hard to trust. Gasoline in a diesel tank, or in a kerosene heater, can cause damage or a fire. That is why most people keep separate cans and mark them clearly.

Why can color and labels matter

US fuel cans follow a common color convention. It is a habit, not a law you must obey at home, but it works because it lets you spot the wrong can at a glance, even in a dim garage.

Many workplaces and suppliers follow it, so a matching can is also easy to find when you shop.

Can you put diesel in a gas can?

Yes, if the can is rated for flammable liquids. Diesel will not harm the plastic or steel of a normal fuel can. A Type II safety can works for diesel just as it does for gasoline.

The risk is mixing. If you pour diesel into a red can and later grab it for the mower, you can wreck the engine. Going the other way, gasoline in a diesel engine harms the fuel system. A yellow can removes that guesswork.

Diesel is also a bit heavier than gasoline, and our best gas can page notes that gasoline alone weighs about 6 lb per gallon. A full 5 gallon can is a real lift, so pick a size you can carry comfortably and use a can with a good handle.

Can you put kerosene in a gas can?

Also yes, with one big caution. Kerosene heaters and lamps are picky about fuel. Even a small amount of gasoline left in a can can make the heater burn unsafely. If you plan to use kerosene for heating, buy a separate blue can and never use it for anything else.

Do not use a can that once held gasoline for a heater. Residue and fumes can linger in plastic walls and in the spout. If you only need kerosene for a torch or a tool and the can is fully dedicated to it, the same rules apply: label it and keep it that way.

Whatever you store, never use food or drink containers such as milk jugs or bottles. They are not made for fuel, they can leak or soften, and they invite a dangerous mix-up.

Switching a can from one fuel to another

The cleanest answer is not to switch. If you must, go slowly and be honest about whether the can is worth keeping.

If a can held gasoline, do not repurpose it for kerosene heaters at all. For a switch between less sensitive uses, follow these steps:

• Empty the can fully into the correct tank or an approved disposal container, working outdoors.
• Let it air out in a shaded, open area away from sparks and flames until no strong smell remains.
• Check the spout, gasket and vent for cracks or swelling. Replace the can if any part looks worn.
• Relabel it with the new fuel name and, if possible, the matching color.
• Take leftover or old fuel to a household hazardous waste drop-off. Do not pour it on the ground or down a drain.

Choosing a can for each fuel

If you want a can built for diesel, our best gas can page lists the Surecan 5 Gal Type II Diesel Safety Can. It uses the same Type II design as the red version, with a thumb trigger, rotating spout and self-venting, plus a 3 year warranty. Its listed empty weight is 4.27 lb, so a full can will be heavy.

For a metal option, the Eagle UI50FS is a Type I 5 gallon galvanized can with a flame arrestor, listed at 7 lb empty. The VEVOR 5 gallon Type I steel can has a listed empty weight of 6.39 lb. Plastic cans are much lighter: the Midwest Can 5610 lists 1 lb empty. Check each listing for the fuel it is meant for, and use one can per fuel.

You can also see how the options compare in our full gas can comparison, including capacity, spout style and build material.

Safe filling and storage

Diesel and kerosene give off fewer vapors than gasoline, but all three burn. Treat every fuel can with the same care.

Eye protection is a smart habit when pouring, since splashes and spurts happen fast.

• Fill and pour outdoors, away from pilot lights, open flames, sparks and smoking.
• Set the can on the ground when filling, not on a truck bed liner or in a trunk, so static electricity can discharge.
• Do not fill to the brim. Fuel expands as it warms, so leave some air space.
• Let hot engines cool before refueling.
• Store cans upright with caps closed, in a ventilated spot out of the sun and away from living areas and ignition sources.
• Keep cans away from children and pets, and check for leaks, swelling or damaged seals regularly.

Frequently asked questions

Is a red gas can ever okay for diesel?

It will hold the fuel safely, but the red color signals gasoline to you and everyone else. If you do use one, label it clearly in large letters and never use it for gasoline afterward.

Can I use the same spout for diesel and kerosene?

It is better not to. Spouts and gaskets hold fuel residue, so keep each spout with its own can and replace any that look worn.

Does a flame arrestor matter for diesel or kerosene?

It adds a layer of protection for any flammable liquid by helping keep outside flames from reaching the fuel inside. Metal safety cans with flame arrestors are common in shops, and several plastic cans on our list include one as well.

How long can I keep diesel or kerosene in a can?

It depends on the fuel and storage. Fuel can degrade or pick up moisture over time, so use it up in a reasonable period and keep the can sealed and out of heat and sun.