• 09/04/2025
  • 2min

Keeping diesel sludge in check: How to protect your marine engine

#Marine

A clean fuel tank is pivotal in reliable engine operation. However, there is something to keep in mind with marine diesel engines in particular: Diesel sludge. LIQUI MOLY provides a solution for that. 

If you love your vessel, you'll protect it – especially when it comes to diesel sludge. It develops when microorganisms settle in the interface layer between diesel and water. These include bacteria, yeasts and molds. The consequences: Clogged filters, corrosion in the fuel system and, in the worst case, engine failure.

Microbes in the tank can become an issue

Diesel sludge develops whenever water collects in the tank – for example as a result of condensation. Microorganisms, such as bacteria, yeasts and molds, particularly thrive in the interface layer between diesel and water. They decompose the fuel, form slime-like deposits and clog filters and pipes. This can lead to engine starting problems, a loss of power or even engine damage.

Long-term protection for diesel engines

Marine Diesel Protect slows down the aging of diesel fuel and protects it against harmful oxidation. In addition, it cleans the fuel system by removing deposits, combating bacteria and thus preventing diesel bug. The entire fuel system is protected against corrosion. The included cetane number booster also makes the fuel more ignitable and completes our all-purpose weapon for the protection of marine diesel.

  • Outstanding aging protection
  • Decontaminates infested tank systems
  • Boosts the cetane number
  • Highly effective
  • Cleans and maintains
  • Active in preventing bacterial infestation

Caution: Take care when using biocides. Take note of the instructions on the label before use.

Preventive or problem-related use

Whether it's for regular use or as shock treatment of already affected tanks – Marine Diesel Protect can be flexibly dosed and is highly effective. Its tested effectiveness according to ASTM E 1259–10 is another advantage of the additive.

More than just mere protection

The additive not only ensures a clean fuel system, it also reduces consumption and boosts engine performance. A genuine carefree package for marine diesel engines.

Tip: Particularly recommended after prolonged downtimes, changing weather conditions or when using fuel containing biodiesel.

Summary

Diesel sludge is a serious problem – however, with the right product, there’s no need to worry. Our Marine Diesel Protect ensures a clean tank, reliable engine starts and a long service life for your engine.