The Consequences of Modern Cars Regularly Using Biodiesel

SOLO — Modern diesel passenger vehicles are not recommended for using biodiesel fuel due to the advanced technology installed in these engines. Continuous use of biodiesel impacts engine performance and requires more intensive maintenance, risking damage to engine components if not properly managed.

Muchlis, owner of Toyota Mitsubishi specialist workshop Garasi Auto Service in Sukoharjo, stated that using biodiesel for diesel vehicles is not actually recommended. Biodiesel contains a mixture of biodiesel from vegetable oils, which makes it more prone to water absorption. As a result, fuel tanks and fuel lines risk developing rust or mould if the vehicle is rarely used.

Water deposits can also disrupt the fuel system, resulting in incomplete combustion. Engine performance can decline if the fuel system is not compatible, causing reduced power output and increased fuel consumption. “If forced to use low-quality fuel, change the diesel filter as frequently as possible. While manufacturers recommend changing it every 30,000 km with quality fuel, with low-quality fuel it could be every 5,000 to 10,000 km,” said Muchlis.

Furthermore, biodiesel combustion residue contains more soot. However, modern diesel engines are equipped with an Exhaust Gas Recirculation (EGR) system that channels part of the combustion residue back into the combustion chamber. “Therefore, modern diesel engines using biodiesel require more frequent servicing. If not maintained, soot accumulation can disrupt the airflow into the combustion chamber, and engine performance may gradually decline,” added Muchlis.