A case of motor oil for the car, or maybe 2, if it is a long ways away. i usually carry 3 qts. for every 60 miles as my Burick still has a lot of life left in it. Sams club has Rotella T for $14 and some change. I hav also fixed the dead battery thing by cutting a hole in the grill and putting a pair of jumper cables through the hole.the other end of the jumper cables stay hooked to the battery. If you are going more than 100 miles away carry some spare tires, i put mine on the roof of the car so I still have room in the back seat for my gas grill.You never no when you might get stranded.I also carry a banner that says WIDELOAD. many times i have been able to pick up some extra$$$$ hanging out at mobile home sales centers waiting to be an escort, I've made some friends for life doing this not to mention some big money.