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Old 04-07-2021, 09:54 AM   #6
mvweebles
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City: Saint Petersburg
Vessel Name: Weebles
Vessel Model: 1970 Willard 36 Trawler
Join Date: Mar 2019
Posts: 7,179
Decent article by Steve D on oil analysis and offers some indicators of what each elevated number might indicate. He also has several pdf articles if you google "Steve D'Antionio oil analysis"

https://stevedmarineconsulting.com/oil-analysis/

High aluminum is from pistons. High iron levels is probably from the cylinders, but could be some simple rust. Copper? Not sure - might be indicative of the bearings, but I would expect Chromium to be high in that case.

The aluminum is enough for me - I'd move on to another boat myself.

Peter
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