If you ask the typical driver how often they should change their oil, the answer would likely be about 3,000 miles. But thanks to advances in engine and oil technology, the 3,000-mile barrier is just a number. Many vehicles can travel 7,500 miles or more between oil changes, but still a large number of drivers head to the nearest oil change facility for their 3,000-mile fix.

The Los Angeles Times reports that the State of California is looking to shift that paradigm with a new ad campaign that will encourage motorists to hold off on that early oil change. The Check Your Number campaign is instead imploring motorists to follow the manufacturer's recommendations, which in the case of BMW could be as high as 15,000 miles. The California Department of Resources, Recycling and Recovery points out that the longer oil change intervals could save 10 million gallons of oil every year.

While we're guessing that many tax-paying oil change facilities in California aren't big fans of this ad campaign, it could save consumers money and conserve resources. And the savings aren't just for California residents either. Nationally, 51 percent of vehicle owners feel they should change their oil at the 3,000 mile mark, and only 33 percent go beyond 4,000 miles.

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