CONUNDRUM--HOW MANY MILES??

Our cars are made to last a certain number of miles.  If you drive a lot---then your car will wear out faster than if you drive a little.  My friend, Steph, tells me we have only so many miles in our legs--so we need to be aware of that fact when we run.  My master gardener friend tells me that plants of all types have a life expectancy--just like we do. It states in the Bible that man is appointed a certain number of years--and then we die. 

WELL---since I am in the car A LOT--these days---living in Limbo Land requires lots of driving---does that mean I will wear out quicker since I am driving lots of miles---or does that just mean my car will wear out faster?  

My conundrum for the day as I drove home from Austin!