Reservekanister.de Guidance. Safety. Choice.
Fuel compatibility

Petrol or diesel in a fuel can

The label on the container and the manufacturer documentation matter more than colour, shape or a retailer category.

Reading time: 7 minutes
Core rule: use a container that is explicitly intended and marked for the actual fuel.

Why the fuel type matters

Petrol and diesel differ in volatility and handling characteristics. The website therefore does not infer compatibility from a generic plastic or metal description. The manufacturer must identify the intended contents and operating conditions.

Do not rely on colour

Colour may help organise equipment, but it is not a substitute for permanent marking. Conventions can differ between manufacturers, industries and countries. A label added by the user also does not replace the original container approval or manufacturer information.

Changing the contents

A can that previously contained another liquid can retain residues. Mixing fuels or introducing water, dirt or chemicals may damage equipment and create safety risks. Follow the manufacturer instructions; where the history of the container is uncertain, do not use it for fuel.

Practical identification

  • Manufacturer and article number can be identified.
  • The intended fuel is stated in the documentation.
  • The permanent marking is readable.
  • Cap, seal and spout belong to the can system.
  • The container history is known.
  • No cracks, deformation, corrosion or leakage are visible.
Country context: transport and storage permissions are separate questions. A compatible can is not automatically permitted in every quantity, route, ferry, garage or workplace.

Frequently asked questions

Can one fuel can be used for both petrol and diesel?

Only where the manufacturer and permanent marking permit the intended fuel. Before changing contents, contamination, residues and the manufacturer instructions must be considered.

Is colour alone proof of suitability?

No. Colour conventions can vary. The permanent marking and manufacturer documentation are more important than appearance.

Can a water can be used for fuel?

No. A water container is not an equivalent substitute for a container intended and marked for motor fuel.

Sources for this guide

The following authorities and documents were used for this guide. Where rules change, the current original source takes precedence.

  1. Questions and answers on dangerous-goods packaging and UN marks [German]Bundesanstalt für Materialforschung und -prüfung (BAM)Meaning, limits and interpretation of UN packaging marks
  2. Fuel in a spare can: what is permitted? [German]ADACGerman transport quantities, container marking, restraint in vehicles, international travel and ferries