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  My Latest Use Oil Report

  Posted by DON on September 10, 2018 at 4:24 pm

  Sept. of 2018 – I’ve been doing used oil analysis (UOA) on my vehicles for 9+ yrs. The main 2 reasons I do UOA is: 1) to educate you and me; 2) to help you and me maintain our vehicles.
  
  Over the yrs I’ve used Blackstone Labs and Oil Analyzers Inc.(OAI) who actually uses http://www.polarislabs.com Indy location to analyze the samples I send in. I found OAI recommendations to be more conservative than Blackstones, so I’ve stuck with OAI over the years.
  
  The engine in our 96 Liberty is a 1995 DDC 12.7L series 60.
  The engine has 83,900 miles on it since new.
  The oil is Chevron Delo400LE 15-40w.
  The oil is 36 mths old and 7500 miles.
  Oil filters are two 36 mth old Fleetguard# LF9620
  

  No makeup oil has been added since last change 3 yrs ago because it doesn’t use any.

  Sample #3 is about my current load of oil.

  
  The lab and I both think the current load of oil is still in good shape. But I’m gonna change the oil and filters soon anyway. DDC recommends that the oil be changed when the “base number”(TBN) gets down to 2/3rds of what it was when new. As you can see in this report this oils base number is down to 4.09, it was 12 when new.

  DON replied 8 years, 1 month ago 1 Member · 0 Replies
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