A World War era car? Also a possible WWIII alternative to gougepriced fuel North Korean armed forces are still woodgas powered:
That is an interesting picture. Usually, the Wehrmacht used a howitzer tractor, such as an Sdkfz 7, to tow broken-down tanks, up until the Tiger I came along. It was so heavy, it took three Sdkfz 7s to tow one Tiger I. So, 347 Sdkfz 171 Panther chassis were made into recovery vehicles (Bergepanther).
A great if-the-SHTF site: http://www.lowtechmagazine.com/2010/01/wood-gas-cars.html Some left the assembly line equipped: