Motor oil is stored generally in an oil pan, below the crankshaft on the underside of the engine. The oil is drawn out of the oil pan by the oil pump and carried to the oil filter where it is cleaned before entering the engine. If it happens ( as it sometimes does in case of limited or no routine auto maintenance and service) that the oil filter itself is so dirty that motor oil cannot pass through the oil filter, in most cases a bypass valve will open and the motor oil goes directly to the moving parts. There are some partly or wholly non-petroleum oils which are referred to as "synthetic oils". According to manufacturers of these synthetic oils , a car or truck can be driven up to 30,000 miles ( 50,000 km) without the requirement or need for an oil change. The most grueling auto racers use premium synthetic oils almost exclusively. What are the drawbacks of synthetics ? Price is the primary concern with synthetics costing from three to five times as much as conventional motor oils and lubricants. But just considering the increased length of time between oil change intervals they provide, the real cost difference may not be all that great by any means or manner of form. Some people just must have top of the line - the very best lubricant money can buy - even dirty un-cleaned motor oil if necessary. It seems that half a loaf of bread is better than no bread at all, or in this essential though lubrication provide by dirty, as opposed to more pure, lubricating fluids.
The motor oil is forced to the top of the engine through narrow passages. It usually and generally goes through the camshaft, up to lubricate the valve lifters and rocker arms, then down to the crankshaft, the pistons and down the inside interior walls of the engine's cylinders. Gravity brings the motor oil eventually to the oil, where the process begins again. Turbocharged engines may well benefit greatly from the use of synthetics because of the improved temperature and high range heat resistance but for the average motorist, synthetics may not be worth the higher outlay, especially if the vehicle is older , high mileage and leaks or burns oil. In addition the motor oil and oils also act as a liquid washer and sealant around the pistons. Motor lubricating oil serves to seal the area on the circumference of the pistons. This way none of the air/ fuel mixture that is compressed for the combustion purposes, - to drive your motor and power plant, can escape. As a result the lubricating oil acts in addition to simple lubricant benefits to increase engine power and horsepower and maintains a far more powerful and efficient power plant that would be available otherwise.
Take great care to abide by legal and environmental laws and procedures when disposing of used crankcase oil and quantities of oils. Dispose of used crankcase oils in a sealable container , service station or quick lube center. Never ever pour these contaminated residuals which can be potentially carcinogenic or at the least toxic to the environment by pouring down a drain or into a storm sewer . Used motor oils can seep into ground water supplies in your neighborhood and adjacent areas and contaminate drinking water. None of us wants to be responsible for our own mini version of the BP offshore crude oil disaster in 2010. Multiviscosity is a most highly desirable characteristic in an auto engine motor oil and lubricant. If the oil is relatively thin at low temperatures, it will flow easily overall and provide good lubrication. This is especially important in the cold northern Alberta winter time climate. From the time the engine starts in the minus 40 degree temperature and the engine oil begins to flow more engine wear and tear occur than in thousands and thousands of normal driving in warmer more moderate ambient temperatures. Yet if there is one message from experienced auto mechanics and technicians it is to change your oil often and early - Synthetic oils were developed by the military in World War 2 of ruse in tanks and military vehicles in the cold Russian winter climates.
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