Holds available engine types.
Available values are:
EngineType.GAS
EngineType.PETROL
EngineType.DIESEL
EngineType.BIO_DIESEL
EngineType.ELECTRIC
EngineType.HYDROGEN
EngineType.HYBRID
EngineType type.
Bio diesel engine
Diesel engine
Electric engine
Natural gas (CNG) engine
Hybrid engine
Hydrogen engine
Petrol engine