A spark plug performs a critical task for your vehicle's engine. Without a spark plug your engine cannot work. Properly working spark plugs also deliver added fuel efficiency. Most owners manuals say to replace the spark plugs every 80,000 to 100,000 miles. When should you replace your spark plugs? If you just purchased a used vehicle at least every 80,000 miles spark plugs are one of the hardest working parts of a vehicle. If you just purchased a used car, it is best to go ahead and replace the spark plugs. Many car owners delay spark plug replacement until the engine starts "missing." An engine that is "missing" will typically result in a jerking feeling when accelerating. Spark plugs that are severely worn out will create a pinging or knocking sound. These fouled, worn-out spark plugs can lead to extensive engine damage that is expensive to fix. Therefore, replacing spark plugs before they reach the 80,000-mile mark is very important!

Increase Your Preventive Maintenance Intervals On These Important Services:

1. Replace your motor oil and oil filters

2. Top off or replace your coolant

3. Have your brake pad thickness and brake fluid inspected regularly

4. Check your tire tread depth

5. Replace your windshield wipers

6. Monitor your transmission and steering fluid

Schedule regular auto maintenance for these essential systems:

1. Brakes, including brake pads, brake fluid, calipers and rotors

2. Tires, including tread wear, proper inflation, front end alignment and balancing

3. Belts, including serpentine, starter and timing belts

4. Hoses, including cooling and radiator hoses

5. Fluids, including oil, transmission, steering, brake, antifreeze and wiper fluids