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  1. S

    First time post, looking for thoughts on UOA

    I appreciate all of the comments. Very helpful. What are the most important indicators to watch when extending the OCI? I'm thinking Soot,Viscosity,TBN,Silicon (SI)?
  2. S

    First time post, looking for thoughts on UOA

    Below are the UOA results from the last 6 samples on a transit bus. The drain intervals are every 6000 miles. I'm curious what experts in UOA think about the results and if the OCI could be extended based on the soot load and viscosity level. MACHINE NAME: 1338 ENG LOCATION MACHINE TYPE...
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