At the price of fuel today you would be better off getting a motel room for about $10.00 more then what it costs to run the van for 8 hours. Not to mention the van over heating while your sleeping. Texas usually has some cheap motels around 35-40 dollars a night. If you know your delivering in a particular state, stop at the first rest area entering that state and get the motel coupon books. travel coupons the "red one" usually has the lowest rates. Not to mention having a tv with cable, bigger bed, A/C, room to move around and a 10.00 savings on a shower if you don't have any on your frequent fueler card or not being near a flying J. besides if you got a run to Tx. you can afford a couple nights in a motel. Might as well be comfortable and rested.