Engine oil performs as a lubricant under tremendous heat and pressure and prevents friction between all metal surfaces in your engine when grinding together. It also transfers heat away from the combustion cycle and delays nasty by-products like silica (silicon oxide) and acids. There are three types of engine oils. First is mineral oil, which comes from the ground and are created from the oil refining process. Secondly is synthetic oil that is more expensive than mineral oil because of the chemical engineering involved in laboratories. It still has a base mineral oil, but it has been engineered to allow for more miles to be driven between oil changes.Lastly is semi-synthetic or premium oil, which is essentially a mixture of the above mentioned two.

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