I've been doing that with cars since 1986. With my typical car, I have run the thing well beyond the 100K warranty to the point where I stop feeling comfortable on long winter drives where a breakdown would really suck. 165,000, 142,000, 118,000, 141,000. I have an SUV as my winter beater with 112,000. My driving pattern has changed since I now telecommute. My Faherenheit GTI will likely run out of time (7 years) before miles. I will eventually collapse the two cars down to one but that will be maybe 3 years from now.
My 2001 GTI was the only car where I didn't come out way ahead on the warranty. It is great because you bring the car into the dealer at 95,000 miles and tell them to make the car perfect. It's then usually pretty solid for a bunch more miles.





