How many miles are Bosch spark plugs good for?
How many miles are Bosch spark plugs good for? Bosch's iridium spark plug series brings OEM iridium long life plugs to the market, with an iridium fine wire center electrode and iridium/platinum alloy tipped ground electrode. Under normal operating conditions, expect a good 100k miles out of these plugs. Should you change spark plugs at 100k? While some spark plugs could last to 100,000 miles theoretically, it's important to remember that plugs that have been installed at around 80,000 miles are already around four-fifths worn out. It's absolutely essential that your spark plugs are in good working order at all...