This video from 1943 has been making the rounds the past couple years on a variety of websites. It’s a wartime training film from 1943 from the O.S.S. (Office of Strategic Services) showing a rather innovative (?) way to destroy the engine of an enemy tank or truck. Essentially, it’s a condom filled with abrasive powders and crushed walnuts that was intended to be dropped into an engine crankcase. Once this is accomplished, the caccolube goes to work, causing the enemy engine to seize up after being run “20 to 30 miles.” We will leave it to the viewer to determine how effective a weapon caccolube may have been.