Regular technical inspections, temporary repairs, small fixes - all of this together ensures us that our car will be smooth and will serve us well for a long time.
You should also know that periodic technical inspection is a legal obligation of the holder of the car, and the avoidance of risk of legal consequences.
Why is it like that? When we repair all by yourself, we can never be sure that we can deal with failure.
We can not be confident that the repair will be successful, and if you're stuck at a standstill, the situation may cause us many problems.
In the crankcase of a vehicle engine, motor oil lubricates rotating or sliding surfaces between the crankshaft journal bearings (main bearings and big-end bearings), and rods connecting the pistons to the crankshaft.The oil collects in an oil pan, or sump, at the bottom of the crankcase. In some small engines such as lawn mower engines, dippers on the bottoms of connecting rods dip into the oil at the bottom and splash it around the crankcase as needed to lubricate parts inside. In modern vehicle engines, the oil pump takes oil from the oil pan and sends it through the oil filter into oil galleries, from which the oil lubricates the main bearings holding the crankshaft up at the main journals and camshaft bearings operating the valves. In typical modern vehicles, oil pressure-fed from the oil galleries to the main bearings enters holes in the main journals of the crankshaft.
From these holes in the main journals, the oil moves through passageways inside the crankshaft to exit holes in the rod journals to lubricate the rod bearings and connecting rods.Some simpler designs relied on these rapidly moving parts to splash and lubricate the contacting surfaces between the piston rings and interior surfaces of the cylinders.
However, in modern designs, there are also passageways through the rods which carry oil from the rod bearings to the rod-piston connections and lubricate the contacting surfaces between the piston rings and interior surfaces of the cylinders.
This oil film also serves as a seal between the piston rings and cylinder walls to separate the combustion chamber in the cylinder head from the crankcase.The oil then drips back down into the oil pan.45 Motor oil may also serve as a cooling agent.
This typically takes longer than heating the main cooling agent ? water or mixtures thereof ? up to its operating temperature.In order to inform the driver about the oil temperature, some older and most high performance or racing engines feature an oil thermometer. Due to its high viscosity, motor oil is not always the preferred oil for certain applications. Some applications make use of lighter products such as WD-40, when a lighter oil is desired, or honing oil if the desired viscosity needs to be mid-range.6Źródło: https://en.wikipedia.org/wiki/Motor_oil.