The test includes:

1. Tested Cleaning Effect

   TÜV Rheinland has tested this fuel in engine test runs in order to ascertain whether it satisfies the requirements in terms of the fuel cleaning effect. The basic properties of the fuels are defined in DIN EN 590 for diesel and in DIN EN 228 for unleaded petrol. To improve various properties a package of additives may be blended to the basic fuel. This package may e.g. include keep-clean and clean-up additives. The related functionality of the additive can be proofed in standardized test procedures.
   
   TÜV Rheinland has defined a catalogue of tests, which establishes the minimum standards for the keyword “Tested Cleaning Effect” according to the product and manufacturer's information. The test catalogue is based on internationally applicable standards or standards common within the industry and exceeds these requirements.
   
   Criteria include prevention of accumulation of deposits on the engine’s intake valves and cleaning the engine’s intake system by reducing existing deposits. The fuel has been tested in the laboratory according to these criteria.
   
   The use of the keyword "Tested Cleaning Effect" confirms that the fuel satisfies TÜV Rheinland's test criteria.

2. Quality

   TÜV Rheinland has tested this product in order to ascertain whether the quality characteristics stated by the manufacturer are satisfied by this product. Amongst the minimum quality requirements are safety, functionality and documentation. TÜV Rheinland has defined a catalogue of tests, which establishes the minimum standards for the quality characteristic according to the product and manufacturer's information, and provided the product is used as intended. The test catalogue is based on internationally applicable standards or standards in common use in the industry and exceeds these. The product has been tested in the laboratory according to these criteria. The keyword "Quality" confirms that the product satisfies TÜV Rheinland's test criteria.