Of the many different auto maintenance tasks, replacing the spark plugs is critical. They're responsible for igniting the internal combustion engine that converts fuel into energy that the car can use. With average use, conventional spark plugs should be replaced about every 30,000 to 50,000 miles; the "long-life" types can last for about 60,000 to 150,000 miles. Of course, the exact frequency will depend on how often you drive and the kind of terrain, so always consult the owner's manual. In both cases, however, there are signs your spark plugs are no longer working properly and need to be replaced. Here are the most common.

When to Get New Spark Plugs

1. Difficulties Starting

Because they're essential for starting the engine, if they're worn down or corroded, you're going to notice every time you try to turn on the ignition. Continually attempting to get them to work will eventually drain your car battery. If you can rule out issues with the battery itself, it's like the spark plugs.

2. Engine Misfire

If you hear your engine pop or it sounds like it's alternating between slowing down and catching up, at least one spark plug may be to blame. Misfires happen when the fuel doesn't burn and raw fuel goes directly into the exhaust. Since the spark plug is vital for the internal combustion process, it's a likely culprit.

3. Poor Fuel Efficiency

When the fuel can't burn properly or efficiently, you're going to notice it in the final costs. Your car will go through it more quickly, so you'll probably find yourself filling up more frequently. Note that other auto maintenance tasks can affect fuel efficiency, like if your tires aren't properly inflated or you haven't changed the oil.

If you're experiencing any of these problems, head to Roger's Automotive in Lima, OH. Known for reliability and customer service, their technicians will determine whether it's new spark plugs you need or something else entirely. They have more than 25 years of experience, so you can trust their expertise and efficiency. You can learn more about all their auto maintenance, diagnostic, and repair services on their website or by calling (419) 222-8880.