The elements present in base oil differ in their composition, sulfate, sulfur, and naphthenic acid. The higher the number of Saturates, the more resistant the oil is to breakdown and loss of viscosity. The lower the sulphur content, the more pure the oil. A higher Viscosity Index, on the other hand, reduces oxidative potential and requires fewer VII additives. If you are looking to buy this oil from a reliable base oil supplier, this information will help you make a better decision.
There are several types of base oils, including Group I, Group II, and synthetic oils. Group I oils are the least refined and consist of a mixture of different hydrocarbon chains. These oils have little uniformity, and some automobile oils are still made from them. Modern mineral base oils, on the other hand, are the product of complicated refining and distillation processes. Crude oil, like synthetic base oils, is not uniformly pure and is comprised of thousands of hydrocarbon compounds.
The amount of sulfur in base oil varies greatly and is a function of the crude oil’s sulfur content and any additives added to the base oil. Sulfur content is hard to measure quantitatively and qualitatively. It is also difficult to find out where the sulfur came from, and whether it is naturally occurring or if it has been added. However, if you notice that the oil has a rotten egg smell, it is probably a result of sulfur that has been added to the oil as an additive.
The presence of metals in base oil can be a sign of worn or corroded parts. The presence of copper is usually an indication that the water pump, coolant core, or other component is leaking and needs replacement. Other metals commonly found in the mixture include zinc, sodium, lead, tin, and zinc oxide. Chromium, which is a harder metal, is usually found in the hydraulic system, including the cylinder rods and valve spools.
The optimal concentration of aromatic compounds in the base oil is necessary for a variety of purposes. The highest concentration of aromatics is typically used for hydraulic oils, electrical insulating oils, compressor oils, and process oils. Lower concentrations are better suited for use in cosmetics. Aromatic base oils have excellent oxidation stability. They are also suitable for use in cosmetics and pharmaceuticals.