In various discussions I have read some good approaches about the start-up. Through my years of work in the tribological field I want to contribute something to the enlightenment. Despite technological advances in the dimensional stability and surface quality, an “adaptation” of the machine elements to each other is inevitable. During the infeed, both the roughness peaks are removed as well as by chemical Raektion and physical Adsorption (see Additive) as cover-up This wear protection layer is about 0.02 to 0.05 nm (nanometer). This wear protection layer is important for cold running, bumping loads or short-term poor lubrication. Wear protection layers are repeatedly obstructed or destroyed during brutal entry into construction. Therefore, medium loads are useful. has shown that the inlet wear is very high up to about 6 h. This means that during this time wear is higher than the protection and there are still many higher roughness peaks. From 7 to 10 h the wear is slowly flattening. From about 15 h only a small wear is visible. For practice this means that if you start an average of 60 km of driving distance per hour: the first 600 km (10 h) with as low a load as possible (also avoid undertouring) in the speed b from 600 to 1000 km quiet times for 2 to 3 seconds in the 2nd and 3rd gears let the engine run up to approx. 1000 rpm under the nominal speed. The engine must learn to turn. At high speeds the mass forces in the crank drive are higher than the gas forces. Thus, for example, the piston rings in the upper and lower dead point are carried out further than normal and thus the wear marks are extended. The engine then becomes more revolving. From about 1000 km you should go on the highway, radio off, the ear on the engine and increase the speed. This as long as the engine does so with light gas feet. When reaching about 20 to 30 km/h below the maximum possible speed at least 40 to 50 km (even more is better). By this drive my engines had a quiet run, little oil consumption and a lower fuel consumption than the by acquaintances. (also gearboxes must be retracted) Greeting