What is oil pressure?
Oil pressure is one of the most important indicators of a car's engine condition. Unfortunately, many motorists have no idea what oil pressure is considered the norm. Let's try to fill this gap. The oil pressure in a system of a serviceable engine that has been heated to operating (90 ° C) temperature is considered normal if it is at least 1 kg / sq. Cm at idle and up to 4 kg / sq. Cm at maximum engine speed. Indicators that go beyond these limits should alert the car owner, as they directly indicate a faulty engine.
Such a wide enough range of oil pressure is considered normal for a number of reasons. The most important is the degree of wear of the crankshaft journal and the connecting rod bearings of the engine. The higher the wear, the lower the pressure will be. The second reason is the crankshaft speed and engine temperature. It is clear that the higher the number of revolutions, the higher the oil pressure.
But overheating of the engine, on the contrary, causes a pressure drop in the oil system, as the oil becomes more liquid.The third reason is the degree of viscosity of the oil that manufacturers of Avtosel specify on the package. Without going into details, we note that, according to the degree of viscosity, automobile oils are divided into winter, summer and all-season oils. This is the short answer to the question of what the oil pressure should be.