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My Latest Used Oil Analysis – UOA
I’ve been doing used oil analysis (UOA) on my vehicles for 8+ 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 81,300 miles on it since new.
The oil is Chevron Delo400LE 15-40w.
The oil is 24 mths old and 5000 miles.
Oil filters are two 24 mth old Fleetguard# LF9620
No makeup oil has been added since last change(it doesn’t use any).Both sample #1 and #2 are for this engine. Sample #2 is about my current load of oil. Sample #1 is from 2 yrs ago, same engine, but different load of oil: https://prevostcommunity.com/forum/threaddetails.asp?Category=General Discussions&ThreadID=4595
This current load of oil is in great shape so I’m leaving it and the filters in place for another year, at which time I’ll either change them, do another UOA, or both.
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5 Replies
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If you want to learn about use oil analysis? here’s a good website:
https://bobistheoilguy.com/forums/ubbthreads.php/forum_summary
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Don,
So even with the high humidity in Texas. Your oil and filters still test good for 36 months. Thats amazing. I bet the analysis cost a lot less than an oil change. -
Don:
Thanks for sharing this information.
I had oil analysis done a couple of times when the race car engine was new. The engine builder explained to me what the various metals found by the analysis were, where they came from, and why they were expected to be present in small amounts.
In your case, how do you know (1) that the oil filter hasn’t collected a bunch of stuff that oil filters are designed to catch and pull from the circulating oil and (2) the oil still has all the necessary lubricating properties that the engine needs to operate without damaging itself?
Maybe I’m missing something from the oil analysis, but I didn’t see any categories for the lubricating quality of the oil. Isn’t that why we change the oil?
Looking forward to your thoughts on this. Thanks!
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Here are some more links to study when your not out shopping for Blinker Fluid.
DDC Section 4.6 – http://ddcsn.com/cps/rde/xbcr/ddcsn/DDC-SVC-BRO-0001.pdf
OAI – http://www.oaitesting.com/reading-reports.aspx#elemental
BITOG/Blackstone – https://bobistheoilguy.com/forums/ubbthreads.php/topics/2780790/UOA_article_-_what_is_%22no#Post2780790
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Here’s a link of the results from the 9 reports that I’ve had done over the yrs on my daily driver.
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