about a month ago, there was a news report about an edmunds.com study on oil changes. they investigated the frequency of oil changes modern cars need, and they proved that the "you need to change your oil every 3,000 miles" idea is a complete lie. the quick lube shops continue to promote the idea with their little window reminder stickers, but they admit, you do not need to change your oil that often (their argument is - well, it's not necessary but it can't hurt to do it that often). the study explains that there indeed was a time when you had to change oil that frequently but with motor oils are much more efficient than they used to be.the website suggests everyone can wait a minimum of 6,000 miles/6 months, but you should follow what your owner's manual recommends. a quick look at mine, for a 2001 Honda, showed that i only need to change my oil every 7,500 miles - which means twice a year, instead of 4-5 times per year. a savings of at least $150 and far less oil being thrown away into the environment.
this country's ridiculous appetite for oil, which in part led to one of our wars; climate change accelerated by our wastefulness; the gulf spill -- it can hurt to change your oil too often.
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