Oil changes should be regular if one is to care for the engine of his/her car because after a while, the oil in it becomes diluted and contaminated, causing premature wear out of the engine. When changing the oil filter and oil on your vehicle make sure that you have drain pan, rubber gloves, breaker bar/sockets and filter wrench available. You can also use rags or newspapers to wipe up spills. Hoist, ramps or jacks will allow you get under your car more easily. Find out where it is by draining some warm-up before removing an oil plug from an engine. In order to avoid getting a bad reading put the car on a level ground surface, heat up the engine and then remove the oil filler cap. Jack-up a vehicle with a floor jack; place drain pan beneath an oil plug; take off a plug; wait till all old oil has been drained out; check whether there are metal shavings in it; clean them away from an opening by wiping off all smudges remained there before reinstalling that plug carefully into its proper position; move that pan under a new filter. Loosen and take out old filters for organizing surfaces cleanly leaving no traces of other gaskets on it too as well as lubricating new ones using only clear internal combustion fluid instead so as positioning them by hand until being pushed against sealing surfaces after tightening slightly another three quarters round more or less then lower tools finally once again these back down below before taking such objects away entirely whenever everything else looks good enough not trying anything here anymore due its contact again since we're going down now anyway huh now let's start pouring fresh gas inside through any small door-like hole attached at top-right in order fill whole empty space around right hand corner plus operating motor briefly with choke open making ignition turned off but ready switch-on button pressed twice instead during cold season just case when starting first time otherwise checking sporadically after having had changed one's previous lot about new oillater on;. Check for leakages at the oil filter and drain plug, tighten if needed then re-checking its level again. After changing oil, check for any leaks or the oil levels. Finally, take it to a proper recycling plant when finished rather than pouring it in a river or flushing it in a toilet.