Got an 01 and wondering when to change spark plugs. Bought it used in 09, and it has 140k. not sure if plugs were ever changed. Runs great, but I was just wondering. Also, since it has 140k, how long could I expect it to last. I take care of it and have done everything( pumps, belts, etc) except plugs. Its payed for and I want to drive it till the doors fall off. Any imput would be greatly appreciated.