This is all regulated by one major chip, which includes just what is referred to as an engine 'map'. This map 'reviews' all the inputs from sensing units and also is programmed to give the ideal setups under a variety of situations. Nevertheless, excellence is impossible to achieve in general, as a number of compromises need to be made. Largely this is because of economic situations of scale. Suppliers have to produce cars for a large range of markets where issues such as energy taste could have a result. As lots of vehicles made use of in Europe could be driven into neighbouring countries with poorer gases available, or may be used in harsh environments where dirt and severe altitudes are common, the engine administration map is a 'extensive brush' approach to take all this right into consideration.
Basically, there is not any sort of factor to take into consideration engine remapping with a sight to either increasing efficiency at the cost of energy usage, or the other way around. There are a variety of specialist remapping business which will offer you the opportunity to have your cake and also consume it!