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It actually worked very well; it was based upon the electronic ferrous metal detection system commonly used on a variety of combat aircraft. A small sensor replaced the oil drain plug and had wires that ran up to an alarm module inside the car; when the ferrous metal content of the oil got too high, it set off a warning. . Its biggest shortcoming was the wires as the sensor was exposed to a very vulnerable spot and the wiring took a beating.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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