Cylinder walls, pistons and rings have microscopic roughness before operation. During the running-in process, these small irregularities are eliminated. High speeds on a new or repaired engine can lead to tiny scuffs, which over time will lead to piston failure. Therefore, taking into account the service life of the engine, it is advisable not to operate the engine at high speeds for the first 1000-1500 km.
Use the following recommendations when running in your vehicle:
- Change the speed of movement smoothly (and along with it the crankshaft speed), so that the moving parts are well adjusted to each other.
- Do not exceed the permissible speed when running the engine in different gears.
- It is better to change gears more often than to exceed the recommended RPM for each gear.
- On a country road, the engine behaves best during the break-in period. Over the next 500 km of driving, you can gradually increase the crankshaft speed.
- Starting from a mileage of 1000 km and up to 1500 km, the engine speed may sometimes be slightly exceeded. Experienced drivers use roads with slopes for this. In these conditions, you can increase the engine speed without overloading it. Make sure that the engine is well warmed up, i.e. the car must drive at least 25 km before this.
- The car should travel about 3000 km (diesel = 6000 km) before its running-in is complete. If the driving mode is predominantly urban, the running-in should continue even longer.