Changed the plugs on my son's 2002 Taurus today, this has the 3.0 Vulcan pushrod V6. The plugs removed were Bosch Platinum that I put in 80k miles ago. What was really strange is the three on the front bank looked really worn while the three from the rear bank were much less worn. Front bank had enormous gaps; about 75 to 80 thousandths while the rear still had the platinum tips and were at about 46 thousand. Why would the wear be different on each bank?