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<p class="MsoNormal">People were trying to use cow magnets to increase road vehicle MPG. I do not know if it was tried on tractors. No actual agency testing occurred. The practice died out so it must not have worked.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">https://www.washingtonpost.com/archive/politics/1980/10/19/cow-magnets-in-cars-are-new-rage-for-gas-conscious-westerners/156b93d4-363d-4fbf-b941-e15b13bb7823/<o:p></o:p></p>
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<p class="MsoNormal">Bill Bruer AT List Member (<a href="mailto:bill_bru@bellsouth.net">bill_bru@bellsouth.net</a>); The cow magnet is properly known as a rumen magnet. I kept one below the filter in the hydraulic filter housing on an IH Farmall 686. It would
always be covered in a fine metallic fuzz. Happily, there was never anything larger stuck to it.<o:p></o:p></p>
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