For an older car that doesn't require the latest MB specs its fine, their is nothing wrong with recycled oil, heck its cleaner going back to the refinery than the crap they pump out of the ground.


You have to remember oil base stock never wears out, it just gets contaminated and the additives wear out. If you could install the right filtration system and replenish the additives you would never have to do an oil change. The Navy has been doing this for a very long time, and I suspect other big commercial operators are too.


I saw one MB owner do this with an E300D and he was up to 130k miles on his current fill, 350k total on the engine. He sent a sample to the lab every once in awhile to monitor and it always came back good for continued use. I suspect manufactures don't do this because its expensive to install and people are stuck in there old school 3k mile change ways.

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2006 CL500
1969 280SE
2023 Ram 1500
2026 Genesis GV70
2007 Tiara 3200