What it is. Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer is a flexible silicon polymer. What it does. Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer is used to adjust the thickness of liquid cosmetic products.Side effects. Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer is generally considered to be safe.inyl Dimethicone/Methicone Silsesquioxane Crosspolymer is used to adjust the thickness of liquid cosmetic products. Side effects. Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer is generally considered to be safe.
In petrol (gasoline) engines, the top piston ring can expose the motor oil to temperatures of 160 Â°C (320 Â°F). In diesel engines the top ring can expose the oil to temperatures over 315 Â°C (600 Â°F). Motor oils with higher viscosity indices thin less at these higher temperatures.
Crankcase temperatures in excess of 250 degrees will cause engine oil to break down into a varnish and eventually cease lubrication. Remember, engine oil has a part in cooling the engine. Some engines are air-cooled, such as the early Volkswagens, Porsche and that fine American icon, the Corvair.