Operation0750−1/A1
Winterthur Gas & Diesel Ltd.
10/ 18
WCH03457
Fig. 1: Piston Underside, Scrape-down or Drip Oil Analysis Interpretation
Note: There are smooth transitions between the different areas shown in Fig. 1.
For engines with chrome ceramic piston rings installed the chromium content of the
piston underside oil shows if there is corrosion or if the engine is worn.
D A chromium content less than 25 mg/kg shows small corrosion, or if the engine is
worn.
D A chromium value more than 25 mg/kg shows corrosion or the engine is worn.
The service life of the piston rings and the cylinder liners can decrease.
D The chromium value must not be more than 25 mg/kg for a longer period.
Note: Engines with cast iron (or non-chrome ceramic piston rings) installed,
can have a much larger total iron level than engines with chrome ceramic
piston rings during usual operation conditions.
2016−11
Lubricating Oils
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