This is a pretty good article and, if you click on the links inside the article, you can also get to the original NYT article on lowering the amount of detergent you put in your washer/dishwasher.
http://finance.yahoo.com/news/Like-the-55-Chevy-the-nytimes-3825041162.html?x=0&mod=pf-family-home
Like the ’55 Chevy, the 3,000-Mile Oil Change Is Pretty Much History
(summary)
Judging by the comments under the article a lot of people still need convincing and they post a number of good reasons why they would still change every 3000 miles.
http://finance.yahoo.com/news/Like-the-55-Chevy-the-nytimes-3825041162.html?x=0&mod=pf-family-home
Like the ’55 Chevy, the 3,000-Mile Oil Change Is Pretty Much History
(summary)
“There was a time when the 3,000 miles was a good guideline,” said Philip Reed, senior consumer advice editor for the car site Edmunds.com. “But it’s no longer true for any car bought in the last seven or eight years.”
Oil chemistry and engine technology have improved to the point that most cars can go several thousand more miles before changing the oil, Mr. Reed said. A better average, he said, would be 7,500 between oil changes, and sometimes up to 10,000 miles or more.
Judging by the comments under the article a lot of people still need convincing and they post a number of good reasons why they would still change every 3000 miles.