By 1942, virtually every American civilian was regestered and had been issued ration books. The American Home Front reacted with enthusem and soon begin salvaging any type of material that would help the war effort.
The wartime Americans could not purchase a new car after 1942. They just weren't being built and new ones were not on the market again until 1946. (Actually, there were a very few 1942 models were built in 1943 called "blackout model" because they didn't have any Chorminum, a vital war material.) Almost all automotive assembly lines had already been converted by then in order to build military vehicles, tanks and aircraft. Chevrolet, Buick and other companys also begin building aircraft engines. Gasoline for use in cars at home was rationed, and a gas rationing sticker
bearing the letter A, B
or C was displayed in the windshield.
"A" meant that trips were not
essential, "B" indicated
someone who needed to use the car for his work, and ""C""
was issued to those whose car was essential, such as doctors.
Nonessential users were limited to three gallons of gas per week,
and new tires were almost impossible to find. People drove below
the speed limit to conserve gas and tires.