How often "Really" changing oil?
Instructor
Joined: Dec 2011
Posts: 994
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From: NJ
A lot of sofa researches, most of you do not bother with UOA to confirm your OCI of 10k. It works for some, does not work for others. Keep guessing and reading stories. Here is one interesting video to watch
I've researched this topic in the past and found virtually zero data that proves more or less frequent oil changes (within reason) make a practical difference in the life of an engine. Yeah there are the oil analyses that look for contaminates and degradation but still no solid proof that changing synthetic oil at 10k vs. 20k miles will make any noticeable difference in the first 15 years or 200k miles that you are likely to own it. I go with the 10k for peace of mind but don't worry at all if that runs up to 12k before getting to it.
I worked with a guy who owned a transmission repair shop and a 1990's Toyota pickup. He bought a new engine mainly for the fun of doing a replacement and decided he was not going to replace the (dinosaur) oil again until the engine started showing signs of heavy wear. He went another 5 years and 60k miles on that oil and never noticed a difference. He sold the truck and still had the engine.
I worked with a guy who owned a transmission repair shop and a 1990's Toyota pickup. He bought a new engine mainly for the fun of doing a replacement and decided he was not going to replace the (dinosaur) oil again until the engine started showing signs of heavy wear. He went another 5 years and 60k miles on that oil and never noticed a difference. He sold the truck and still had the engine.
Go search the past BMW long oil change recommendations and look at some engine tear down images. It's called sludging.
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ricky0204
ES - 1st to 6th Gen (1990-2018)
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Sep 6, 2020 09:28 AM