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Stand two identical steel cans next to each other on the trail and there is exactly one way to know which holds gasoline and which holds diesel: the color. Jerry can color coding is a convention, not (in most places) a law — but it's a convention that prevents the single most expensive fueling mistake in overlanding: diesel in the gas engine, or worse, gas in the diesel.
Here's what each color means, and which Wavian NATO can to buy for each job. (For why Wavian over the alternatives, see our Wavian vs Rotopax vs Scepter comparison.)
The color code
- Red — gasoline. The near-universal convention in North America. If you carry one fuel and it's gasoline, your can is red.
- Yellow — diesel. Matches the yellow diesel nozzles and caps used across the industry. Diesel tow rig? Yellow can.
- Blue — kerosene. The traditional kerosene color — heater and lantern fuel for cold-weather camps.
- OD Green and Black — utility. The military-heritage colors. No fixed fuel meaning — many overlanders run green or black for looks and add a fuel label. If you do, label clearly and permanently.
One rule above all: once a can has held a fuel, it keeps that assignment for life. Residue never fully leaves a steel can, and cross-contamination ruins fuel.
What about water?
Not in a steel fuel can — even a brand-new one. Steel fuel cans are lined for hydrocarbons, not potable water, and a can that's ever seen fuel is permanently off the drinking-water list. Carry water in dedicated food-grade containers and keep the steel fleet for fuel only.
Why the NATO design earns its reputation
Every Wavian color is the same can underneath: 0.9mm cold-rolled steel, fully welded seams, an anti-corrosive lining, and the three-handle NATO pattern that lets one person carry two cans or hand one along a line. The bayonet-mount spout locks on and pours fast with no glugging and no spills — and the 20L can-and-spout system is EPA/CARB compliant for the US market.
Building a two-fuel fleet
A typical diesel-truck-plus-camper setup: two yellow cans for the truck, one red for the generator or chainsaw, and one blue for heater kerosene in winter. How much to actually carry is range math — work it out with our fuel range planning guide, and brush up on safe filling and pouring in the NATO can safety guide.
FAQ
Is the color legally required? Rules vary by state and country; the color convention itself is industry practice rather than federal law in the US. What regulators care about is that portable fuel containers meet spill/emissions requirements — which the Wavian spout system does. Check local rules for transport quantity limits.
Do all colors come in the same sizes? Wavian's lineup covers 20L (5 gal), 10L, and 5L across the range — the 20L is the classic overlanding size.
Can I repaint a can? You can, but a fuel label is safer than repainting — paint over a fuel assignment invites exactly the mix-up the colors exist to prevent.
Build your fleet: all five Wavian colors ship free with free 30-day returns — code RVSAFE10 takes 10% off your first order your order.