Fuel Contamination

Water is the most common contaminant. Diesel can grow microbial sludge, especially when stored for a long time. Fuel filters catch particles before they reach the injectors. Fuel samples can be tested when contamination is suspected. Keeping the tank fuller in winter reduces condensation.

Contaminants block filters and injectors, corrode parts or reduce lubrication.

Refuel at reputable stations and replace filters on time. Drain the water separator of a diesel filter when the warning comes on.