A: Some models have got an oil life indicator system that lights a lamp or shows a message on the instrument panel when it needs to be changed. A number of things are taken into account in order to determine that the oil is due for replacement. It should be noted that this system will allow the automobile to travel more miles before making an oil change than the usual 3000-mile interval, but often changing oils are inexpensive and will prolong engine's life. If you opt not to change your oil every 3000 miles but rely on the oil life monitor instead, just ensure that you don't exceed 7,500 miles before changing your oil regardless of what the monitor reads. From among the many preventative maintenance procedures possible for home mechanics frequent oil changes still rank top. Premature engine wear results from dilution and contamination as engine oils age hence this should be known by any person who wants to do this job themselves (drain pan, rubber gloves, breaker bar, socket set and filter wrench are necessary tools when changing engine oil/filter). Also remember having plenty rags or newspapers around for mopping up spills; if vehicle can be lifted on hoist or driven onto ramps or supported by jack stands access to oil drain plug and filter will become easier; get under it now if you have not done so already Find out where exhaust components run while working underneath because they might be warm Park level surface shut off warmed-up engine Remove valve cover's filler cap Raise safely supported vehicle Being cautious about hot exhaust parts put drain pan beneath bottom plug of motor Take care not rounding off drain plug during removal with proper size box-end wrench/socket Final few turns maybe unscrewed gloved hand avoid being scalded by hot Move slightly slow trickle inspection old for metallic particles Wipe clean rag any small ones clinging would instantly pollute fresh Clean area around reinstall tightness specified manufacturer; relocate under Loosen counterclockwise standard cartridge-type filters remove cover some engines elements block just after unscrewing from mounting surface on block; if necessary scrape off remaining portion old gasket Make sure same type lubricate screwing it in place; filter wrench normally not used overtightening damages typical manufacturers only recommend hand tightening normally 3/4 turn but follow directions container tighten securely lower spilling tools materials Add funnel prevent top quart first allow into then dip stick leaks oil pan drain plug and around will be checked frequently trips cannot present state check with local auto parts store or any facility environment agency they ground reset display "OIL XXX% NEW." hold two seconds should SET THIS CAN BE SHORTENED BY EACH REDUCES INTERVAL 10%.