a Reference to Diesel trucks, which commonly burned enough oil to notice on a single tank full of fuel. some diesel trucks even had a sticker on the fuel door that said "check engine oil" so as not to run it out.
GM/Chevrolet's diesel motor used in many of their trucks. Despite being basically the best on the road (I like Ford's) we still like to make fun of it for being a completely foreign made motor, therefore "duracraps"
"Man, that junk Duracraps couldn't even tow a paper plate"