The oil pump takes oil from the engine oil pan and delivers it to the oil filter. On the discharge side of the oil pump there is a bypass valve. If the oil pressure is too high, the valve opens and some of the oil flows back into the engine pan.
Through the middle of the filter element of the oil filter, clean oil enters the main oil line. If the filter is clogged, the bypass valve located in the oil filter housing supplies unfiltered oil directly to the main oil line. In the oil filter pipe there is a check valve that prevents the oil channels and hydraulic tappets of the engine valves from emptying. Channels for lubricating the crankshaft bearings branch off from the main oil line. Through inclined holes in the crankshaft, oil is supplied to the connecting rod bearings, and from there it is sprayed onto the piston pins and cylinders. At the same time, oil is supplied through the ascending channels to the cylinder head and provides lubrication of the camshaft bearings and operation of the hydraulic tappets.
Oil consumption
When talking about oil consumption in an internal combustion engine, we mean only the amount that is consumed during combustion (burnout consumption). In no case should oil consumption be confused with oil loss due to leaks in the oil pan, cylinder head cover, etc. Normal oil consumption occurs due to the combustion of a small amount in the cylinders, as well as due to the removal of combustion residues and wear particles. Oil ages under the influence of high temperature and pressure in the engine cylinders. Oil consumption is also greatly influenced by external factors, such as driving style, as well as the precision of engine parts.
The maximum permissible oil consumption during operation may be 1 liter per 1000 km.
Once the "MIN" mark is reached, it is essential to add oil (the volume of oil added should not exceed 1 l).
Selecting oil for the engine lubrication system
All-season oil is used to lubricate Hyundai engines. It can be used both in winter and in summer. All-season oils are based on liquid seasonal oils (for example, viscosity class 15W). Due to the so-called thickeners, the oil is stabilized in a hot state, so the necessary lubricating properties are provided for each state. The letter "W" in the SAE classification indicates that this oil can be used in winter.
Light-running oils are all-season oils with antifriction additives, their use can save fuel up to 2%. Light-running oils have low viscosity (for example, 10W-30). They require a special base (synthetic oils).
(The text is provided by the web resource: HyundaiBook)
The recommended oil quality class according to API is not lower than SG or SH.
Recommended SAE oil viscosity grade – depending on expected ambient temperature until next oil change.