Nobody gets past that: Fuel filters.

A fuel filter protects the injection system of an engine against contaminants in the fuel and contributes to a reliable functionality of the injection system and a perfect engine performance.
Hengst fuel filters are able to withstand pressure peaks of up to 15 bar. They have been fitted with the latest filter materials, such as meltblown media, and thus are able to ensure perfect filtration, during which dirt particles of less than 2 µm are effectively removed. Thus, engines and injection systems are protected effectively and change intervals can be prolonged.