Your vehicle’s air filter helps protect your vehicle by preventing harmful contaminants such as pollen, dirt and sand from being sucked into your vehicle’s engine. There are warning signs to look for that indicate your air filter is dirty. Look for poor gas mileage, a misfiring or idling engine, gasoline smell, black smoke, the check engine light illuminated and decreased engine power, throttle response and acceleration. Your air filter should be changed every 12,000 miles or 12 months to best protect the engine. Luckily, the process of changing an air filter is relatively simple. Your friends at Leif Johnson Ford would love to walk you through the steps! First, purchase an air filter that matches your vehicle’s make and model. If you need help with this, do a quick internet search or call your friends at Leif Johnson Ford! Mark your new filter with today’s date. This will help you remember how long it’s been since your last filter change. Make sure the your vehicle is secure. Park the car on level ground and apply …