What abuse would that be?? The wife's Toyota Corolla has about 100 mile/day put on it (five day work week). It's coming up on 50,000 miles, and the gas mileage is still about 39.7 mpg (actually up a bit from showroom new mileage).
I bought an HHR for business. 156k miles in three years. The cost of tires, brakes, and other ancillary costs make it more expensive to drive than my Trailblazer was over the same period.
The reason is that it was simply not built for work—it looks like it was—and it was positioned that way. But it really is a lightweight peice of junk.
Good mileage though.