What makes diesels different?
A diesel engine produces more particulate in the system as a result of combustion that can create deposits in the fuel system and can lead to reduced fuel economy and power. Short stop and go trips are more susceptible to this build-up of deposits, typically due to the diesel particulate filter not getting hot enough to regenerate.
Injectors are designed to deliver a precisely measured mist of fuel into the combustion chamber, but a dirty injector will disrupt this fine pattern into a coarse, intermittent stream, and can lead to decreased fuel efficiency.
Diesel fuels may form waxes or be contaminated with water that can plug the fuel filter. These conditions may result in poor starting, rough idling, poor combustion, hesitation or power loss under acceleration, stalling, loss of fuel economy and increased emissions.
In colder temperatures, the paraffins in diesel may form into gel that can, in severe cases, block the fuel filter and fuel line leading to poor starting or no starts.