Wood powered truck!
I grew up with horses, as soon as I got my first 10 speed bicycle I realized immediately that bicycles were a far superior form of transportation. My first 10 speed was a 40 lb used Murray; weeks after getting it my 13 year old youthful entusiasm propelled me over 50 miles up to Mt. Raineer and 50 miles back in a day. That bike gave me previously unimaginable freedom.
Post apocalypse... the scarcity and price of fuel will severely limit the use of internal combustion powered vehicles. The possible exception would be people who build or buy gasification units for their vehicles.
I provide the following link only for reference... I have no idea if they are reputable.
http://www.gasificationplans.com/
Wood powered truck!