Depending on a vehicle's age, regular oil changes are an essential part of preventive maintenance. Engine oil can become diluted and contaminated over time, ultimately resulting in premature wear of engine components. Some people might say that you should change your oil filter every other oil change, but the low cost and ease of installing a new one are both worthy of changing it each time. Gather together all the tools and materials before you begin. You should have clean rags and newspapers to soak up spills. It is easier to get underneath a vehicle if it is up on a hoist, driven on to ramps or supported on jack stands. Get to know where the oil drain plug and oil filter are located, avoiding hot engine and exhaust components. Put the engine at normal operating temperature and during that time, gather any other tools that you need or oil. When the engine oil is warm, raise and support the vehicle safely and position the drain pan below the drain plug. With your wrench, slowly undo and remove the drain plug. Allow all the old oil to drain into the pan. Before putting it back in, wipe off the drain plug. Place the drain pan underneath the oil filter. Using a filter wrench, gently loosen the filter. Be careful of the oil in the filter. Before installing the new filter, compare it with the old one to ensure they match, then clean the mounting area and see if any rubber gaskets are stuck there. Before putting the new filter on the engine, smear a light coat of renew oil on the filter gasket. Tighten to the manufacturer's specification. Once you have removed all tools and rags from under the vehicle, lower the vehicle. Find the oil filler cap in the engine compartment. Put three or four quarts of fresh oil into engine, wait a few minutes and check dip stick for the oil level. If the level goes beyond the L mark, start the engine to allow the new oil to circulate. After a brief period, check for leaks at the oil pan drain plug and oil filter. After the new oil has circulated, check the dipstick again and add oil as needed. In the case of a leak, check the oil level after the first few rides and top it up if necessary. The expired oils are cannot be reused but take them to an oil reclamation centre, auto repair shop, or gas stations that do accept used oil.