Some simpler designs

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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.6Źródło: https://en.wikipedia.org/wiki/Motor_oil

Wikipedia about oil

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An oil is any neutral, nonpolar chemical substance that is a viscous liquid at ambient temperatures and is both hydrophobic (immiscible with water, literally "water fearing") and lipophilic (miscible with other oils, literally "fat loving"). Oils have a high carbon and hydrogen content and are usually flammable and slippery. The general definition of oil includes classes of chemical compounds that may be otherwise unrelated in structure, properties, and uses.

Oils may be animal, vegetable, or petrochemical in origin, and may be volatile or non-volatile.

They are used for food, fuel, lubrication, and the manufacture of paints, plastics, and other materials.

Specially prepared oils are used in some religious ceremonies as purifying agentsŹródło: https://en.wikipedia.org/wiki/Oil

car blocked on the track - what to do?

Car crash can occur when you least expect.

Very often there is a situation on the road, when we are far from home and from the proven mechanics, to which we have confidence.

In such a situation, the best solution is to use a special insurance that allows you to tow the car and ensures delivery of a replacement vehicle. If we can not take advantage of such a solution, there remains nothing else but to bring the vehicle to the nearest garage which is located in the area. Fortunately, nowadays universal access to the Internet allows you to quickly locate such a facility. But in order to guard against such problems, it is regularly serviced and auto repair any faults on time..

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