I have a 130 mile round trip commute I drive daily and have driven my 8 at least 3 times a week so I am right around the 6200 mile mark for the summer, and I made a trip to see my son at VMI.
The only issues I have had recently, other than the little smoke from my right exhaust, is the 8 does not like to sit in traffic in the heat. The 8 heats up quickly. No fun worring about over heating. I am looking at pulling it in the garage in about a month and taking the heads off and sending them out to be redone and a few other little things. I am in the porcess of putting on a new porch so it is a way down on things to do.