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Free minder
Join Date: Nov 2001
Location: Middlessex county, MA
Posts: 9,422
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The principle seems pretty cool: my understanding is that it measures the double layer capacitance of the oil, which increases with the concentration of protons. Thus, a worn oil is more capacitive because more acidic. The capacitance is obtained by the slope on the oscilloscope signal.
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1978 SC Targa, DC15 cams, 9.3:1 cr, backdated heat, sport exhaust https://1978sctarga.car.blog/
2014 Cayenne platinum edition
2008 Benz C300 (wife’s)
2010 Honda Civic LX (daughter’s)
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