Check out this page for an interesting list of mileage OCIs for various makes and models. http://www.3000mileMyth.org/fulllisting.html The web site is called 3000 Mile Myth . org. The web site shows the manual for the Chrysler 300 recommends a 3,000-mile OCI. That doesn't fill me with confidence about the Chrysler 300's engine. The manual for the 2003 Volkswagen Jetta called for a 5,000 mile OCI (oil change interval), but for the more recent '07 Jetta, the manual says 3,750 miles. [Gulp.] What happened there? The '07 Hyundai Sonata has a 3,000 mile OCI. The 2007 Nissan Altima is only 3,750 miles. Thankfully, the '07 Toyota Camry and '07 Ford Mustang indicate 5,000-mile OCIs. The Chevy Cobalt went from a recommended 3,000-mile OCI in 2006 to a recommended 7,500-mile OCI in 2007! In one year, the manual more than doubled the OCI. Wonder what the story is there. The '06 Chevrolet Impala is 7,500 miles.