lessuf.blogg.se

Different polymer combinations are made to essentiallyĪlter the viscosity of the oil at different temperatures. Hence, it isĮvident that viscosity is the single most important characteristic deciding theĮfficiency of these oils. The rating is primarily based on the viscosity of the engine oils. Polymer as much as which the oil thins at high temperatures. The lower the number, the less viscous the oil and better the Number tells us which single grade polymer the oil behaves like under coldĬonditions. Which shows that the oil has been tested to work under cold conditions. Multi grade ratings are in the form xWy (eg. The oil only thins to a particular extent so as to keep the engine sufficiently Under cold conditions, the oil is thin enough to grease the engineĪnd allow for proper ignition and running. These behave as differently rated single grade oils under different temperatureĬonditions. Therefore, multi grade oils are more popular. However, single grade oils cannot withstand the variety of conditions Multiple polymers (multi grade) and are rated accordingly. How it is rated: Engine oils can be made of singular polymers (single grade) or It also cleans, inhibits corrosion, improves sealing, and cools the engine by Sides of the cylinder block, the oil creates a layer that lets them move When the pistons of the engine move back and forth they wear out the The main function is to reduce wear (deterioration due to friction) on moving

Motor oil or engine oil is used for lubrication of various internal combustion

Why is engine oil used and how does it work? Metre high, 5cm broad cylindrical glass tube

Temperature and thereby determine the most effective one for aġ. To compare the viscosity of different engine oils at a given Of the given choices, you must use your knowledge of physics and viscosity toĬhoose the oil most suited for your diesel engine car. You notice that grime has accumulated in yourĮngine and the motor oil has to be replaced for your car to start. Suddenly your car breaks down and you open theīonnet to see what’s wrong. You are driving your diesel car on the road to Shimla (a hill-station) and it is 25ĭegrees Celsius outside.

Physics Investigatory Project on Fluid Mechanicsįluid Mechanics: Viscosity of Engine Oils