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John Burgess asked the Naked Scientists: Hi Dr Chris and Team,Great show. Motor vehicle oil manufacturers promote "magnetic" type oils. The idea being to leave a coating of oil on the metal parts to reduce wear. School boy physics taught that magnets are destroyed by percussion and heat. The engine is a place where both percussion and heat are in abundance therefore, surely, destroying the magnetic properties of that oil. Are we being duped? Or have we created heat and shock resistant magnets?Regards,John BurgessWhat do you think?
"Castrol Magnatec" oil isn't magnetic ferrofluid: it changes its properties with temperature (sticks to hot bits), making "intelligent molecules" according to the manufacturer ... http://www.castrol.com/castrol/extendedsectiongenericarticle.do?categoryId=9014096&contentId=7030435