How does the Lubricheck work?

The Lubricheck uses a patent pending technology that measures the capacitive and resistive properties of oil. Oil degrades due to mechanical friction, high temperature, high pressure, moisture, oxidation, and absorption of contaminants. These changes cause a change in capacitive and resistive properties. The Lubricheck compares the sample being tested with stored values of fresh oil and displays the results by lighting 1 of 10 LEDs.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13