Twin-Cam Common Rail Diesel engine delivering . It is because of CNG need a source of ignition for combustion in diesel engine. The 308 features a range of petrol and diesel engine options. This makes the diesel engine very economical. There are several GM 6.5-liter diesel engine production options. Available only with 1.3 JTDM diesel engine. The model comes with either gasoline or diesel engine choices. It gets a 2.5-liter diesel engine option. This is the only equipment level available for the version of the 1.5-litre diesel engine. DEF is system of injected urea that reduces the emissions of a diesel engine. The Avensis offers three petrol and four diesel engine options. SAE J1939 has been adopted widely by diesel engine manufacturers. In 1949 it began production of its first diesel engine. See Oldsmobile Diesel engine for more information. It was powered by a large diesel engine.