Saab smoking exhaust Some simpler designs
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. In some constructions oil is sprayed through a nozzle inside the crankcase onto the piston to provide cooling of specific parts that undergo high temperature strain. On the other hand, the thermal capacity of the oil pool has to be filled, i.e. the oil has to reach its designed temperature range before it can protect the engine under high load. 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.6
Źródło: https://en.wikipedia.org/wiki/Motor_oil
Standard maintenance services
With the increasing number of cars is also increasing demand for services such as servicing cars. During the maintenance staff of people working on this, that our car was comprehensively tested in every respect. Even the slightest defect can in fact cause considerable danger on the road. The most common services they perform service technicians working in garages are primarily replacement car parts and ongoing maintenance. Sometimes there is a need to leave the car for a few days in the workshop in order to accurately and precisely mount the data elements or remedy the fault. In such cases, we can often expect us to provide transport from the service centers.
Is part of the car are expensive?
Auto parts, some of us are buying a lot more than clothes. This is often caused by poor technical condition of the vehicle or improper service, but sometimes it happens also that in the beginning we buy cheap part, which breaks down after a few days. How can you avoid such situations? The best is of course to buy original parts, even though they often cost a lot more. The cost of repairs due to specific parts can often be very high, but we always pay more to pay more for the first time, than to pay small amounts, but often. Having your own car we always have to reckon with this type of expenditure.