Quality advised oil change is crucial for maintenance, since over time the oil became diluted with contaminated matter, causing faster wear of the engine parts. Because it is relatively cheap, and the process of changing the filter is relatively easy, changing the oil filter should be done at every oil change. Some requirements for an oil and filter change are a wrench for the drain plug, an oil filter wrench, a container with a least six-quarts for the draining of old oil and a funnel or spout for the pouring of fresh oil. Having clean rags and newspapers is useful for spillages and getting to the underside of the car can be achieved by hoist, ramps or jack stands, do not support the car solely by a bumper or a jack. It is advisable to try to familiarize oneself with the positions of the oil drain plug and the filter before starting operation because by the time that operation is performed the engine and exhaust components will be hot. To enhance oil drainage, the car should be warmed up to normal operating temperature; when the car is up, all the tools and materials required should be within reach. The drain pan should be positioned below the drain plug and much attention should be taken when unscrewing the drain plug due to hot oil. After a technician has removed the old oil, the drain plug ought to be inspected for signs of corrosion, cleaned, and then fitted back as tightly as possible and with predetermined amounts of torque as may be prescribed. The oil filter should be unscrewed and taken out, if possible, the residual oil should be drained into the drain pan. Making sure that old and new filters match can help and the part of the instrument where the filter is installed should be wiped down. Before installing the new filter, fresh oil should be used to fill it and also to wet its gasket. When all tools are out and the car has been lowered, new oil can be poured through the oil filler cap and usually a starting quantity of three litres can be given. Once the oil has rested and the dipstick has been pulled out to measure the level, and if at all the engine can be turned on for a few minutes so as to circulate the oil so that any leakage can be detected. Last but not the least, the oil level must be set up to the 'Full' mark and the used oil requires proper disposal at authorised centres.