Motul Fuel System Clean: Additive binds condensed water in the tank

Cologne, May 2026 — Warm days above 20 degrees followed by cold nights in the single-digit Celsius range: This is exactly the time of year when there is a problem that is still little known to drivers of (combustion) motorized vehicles: condensation in the tank. It forms overnight in the truest sense of the word, quickly enters the fuel system during a cold start and has very negative consequences for all gasoline engines. An additive from Motul prevents this from happening: Fuel System Clean has many advantages as a fuel additive. One of them: Water is bound and removed from the entire fuel system via combustion before contamination or even damage occurs.

Spring brings condensation into the tank — fatal for all petrol engines

The brief succession of heat and cold in the current spring days has consequences for every fuel tank and its contents: While warm air can bind more moisture (initially in gaseous form), overnight cooling causes it to condense (as a liquid). Since water is physically heavier than fuel, this condensed water collects at the deepest point of the tank, i.e. exactly where the engine is supplied from. As a result, it enters the injection system or the combustion chamber of the engine the next time the engine is started. The cold-start behavior of engines is worsening, injection system components can be affected by corrosion, and overall performance decreases.

Fuel System Clean — cleans the fuel system and binds water

The solution is called Motul Fuel System Clean and is a powerful additive that can be added directly to the fuel tank. It cleans the entire fuel system and is therefore a smart ingredient when it comes to optimal engine performance anyway. One of the main advantages in the current spring season is that Motul Fuel System Clean binds the condensation in the fuel and prevents it from settling in the tank. It also lubricates, cleans and protects the entire fuel system from the tank to the upper combustion chamber area and helps remove carbonization and unburned carbon residues. It thus ensures cleaner engine operation, smooth response, reduces emissions, improves protection and supports consistent engine performance.