How does a fuel check work?

Customers can choose whether they want to carry out the fuel check themselves or have it done by Tec4Fuels or a contracted company. If you want to take a sample in your fuel tank yourself, Tec4Fuels will provide you with a sampling kit. Detailed instructions (link to instructions) on how to proceed and how to send the sample to an analysis laboratory will be provided. The sample is taken from the day tank. If after the analysis it turns out that the fuel in the day tank is not usable or only in critical state, Tec4Fuels recommends to take an additional sample from the main tank and have it analyzed. If the sample from the day tank is still in order, an analysis of the contents of the main tank is not necessary.