Review on Autolite XP605 4PK Iridium Spark Plug by Gregory Shorunov

Really excellent spark plugs. Regular, Platinum and Platinum Plus wear out after 12-15 thousand miles. They have 40,000 and my Ford still starts like I put them on yesterday. I don't know how long they will last. However, they are by far the best spark plugs for my minivan. I have a Ford Aerostar where changing the spark plugs is very difficult and takes hours, hours actually. So I spend extra money to buy more time between replacements. I have driven three times as many kilometers so far and they do not need to be changed. I recommend replacing yours with these for better performance and longer replacement cycles. Be sure to use anti-seize grease on the threads and dielectric grease on the boots for easier removal later.