How often should I get an oil change for my car?

Answer: NOT every 3000 miles. (unless your car pre-dates electronics)

In the first 3 years of a new car, probably every 7000 miles or so. I have gone more than 10,000 miles on several cars without any problems. No decrease in gas mileage. No decrease in horsepower.  Basically with no problem at all. For an average driver, you  might do 15,000 a year. That's 5 oil changes at $50 each ($250). Probably a low estimate.

This is being a bit conservative assuming air filters and other add on costs. Based on my experience, 2 oil changes would be plenty ($100). So this is a savings of $150 over the first 3 years of your new car or $450 saved! The only unhappy person is your dealer or your local Jiffy Lube.

BTW, don't be tempted by oil change coupons from QUALITY TUNE UP or some independently owned gas station service center. I have experience that they will make up fake charges that at the end of the day negate any potential savings from the coupon.