On the taxi-cabs antecdote, how many years does it take them to rack up that mileage? Its my experience that time weighs more heavily on vehicles than miles.
As to OP, first congratulations on your time, thats pretty good, especially for that old heavy beast. As to the rest of the post I believe most car publications and experts agree its good to blow the proverbial cobwebs out of your engine every now and then. A good full throttle romp clears carbon out of the combustion chamber and moisture out of the exhaust, etc. Plus its just good for the soul.
