I run my Corolla at close to 100 mph for days at a time, crossing the great southwest (running the a/c), delivering heavy loads of tools.
My car runs hot, and my mileage is not as good as the EPA estimates. Also, I have to change oil more often than every three months. Plus, I have to replace tires once every three months - my old car, before I got this delivery job, might go four years on a set of tires.
Someone suggested I should get a delivery truck, but I am sure if I cool this car down a little, I wil be fine.