My truck has a 25 gal. gas tank and a 20 gal supplemental tank. It only gets around 15 mpg on the highway but it will get that regardless, almost, of its load. With the supplemental tank I get around 675 miles of range. With 6 Jerry cans holding another 30 gal. It has range. When I sent my brother I had the Jerry cans full. I told him to gas up both truck tanks north and west of Tampa so he could get down to Naples and back maybe on that alone and he would have the Jerry cans if he got stuck in traffic.
He was fine, everyone is now in Atlanta. Gas along the highway was an issue for some but not so much once they hit Georgia. Apparently he gave away one of my Jerry cans, and the gas inside to some hottie stalled out on the side of the road. out of gas. With my parents, sister, and her kids in the car all he got in return was a thank you. Me, I get nothing but one can gone. Oh well, probably the right thing to do. Save the hot ones, let nature cull the uglies if they can't fend for themselves.