How often should I change the spark plugs on my 2007 Ford Fusion?
Don't know if I need to change my spark plugs, car has about 40,000 miles on it.
Would not hurt to change them,usually around every thirty thousand mile,s just for good fuel economy.
Most plugs are good for a lot of mile,s,but depends on how the car is serviced and driven.
Platinum plugs are usually good for 100,000 miles. Refer to the owner's manual for the recommended change interval. If you do not have a manual get one from www.helminc.com