Vehicle Maintenance Schedule Cleaning up the air in North Texas is every citizen's responsibility and it can be as simple and low cost as a car tune up, oil change and properly inflated tires.
Ozone is mainly a daytime problem when temperatures are high, sunshine is strong and winds are weak.
On ozone alert days, the elderly, young and chronically ill are most at risk for respiratory problems. Ozone season runs from May 1 through the end of October. Worn spark plugs or clogged fuel injectors can reduce fuel efficiency by up to 30 percent. When tires aren't properly inflated, fuel efficiency drops by up to 8 percent. Studies show that dirty oil can cause 35 percent of vehicles being tested to fail emissions standards.