A car’s engine efficiency remains at its best when it just rolls off from dealership. However, there might be a dip in combustion process over time. And, it might hit a low at a point of time. Before delving deep, let’s understand about the engine efficiency first. What does engine efficiency mean? In scientific term, the efficiency of a car’s engine signifies the capacity of turning the thermal energy into mechanical energy. If an engine does not convert fuel into engine power properly, it is said to have a low level of efficiency. Engines that burn fuel are ...   read more