I remember an information (that I've read several time ago) about best practice for motor vehicle engine operation, which states that the engine will reach optimal performance at a certain temperature. Now, I will try to explain it, with my logic and some knowledge in theoretical physics.
In physics, there are theories about the thermodynamics of metals, fluids, gas (air and fuel).
A metal will expand at a high temperature. With this expansion, this metal will be more tightly coupled, so it will reaches a very high compression state (fuel-air mixture), then a spark will ignite it so that combustion occurs, then will produce more powerful engine. The expanding combustion gases push the pistons, which in turn rotate the crankshaft, and this motion drives the wheels of the vehicle. at low temperature, compression will be lower. because the metal gap in the more tenuous.
In this process some lubricant/oil is required, which will prevent wear from scraping the metal. The lubricant will also expand or at low viscosity at high temperatures, and this will result in smoother circulation in the metal gap (piston). if the lubricant is at high viscosity (low temperature), it will be difficult to move or circulate.
In this process will produce combustion between gas and fuel. At high temperatures, the fuel will burn more easily, which will also result in an accelerated combustion time, so that it will produce stronger energy (caused by the faster of combustion process).
With the three conditions above, I believe the machine will work in optimal and efficient process. Efficient means more power with less fuel consumes, the result of the optimal processes or higher engine performance.
Thanks.
