Recent content by W72

Yes

Maybe, or maybe not. Probably some, probably not all. Probably some types, probably not all types. The series of UOAs that I propose would answer that. Which contaminants are flushed out of the system through the exhaust? to what extent? or which get trapped in the sludge?

Correct. For example an engine that consumes a quart every 1000 miles. After a complete oil change, send in samples for UOA every 1000 miles (at 1k, 2k, 3k, 4k, 5k, ... miles) until the report contains a recommendation for a complete oil change. So send in samples Mostly I'm interested in...

If not propspectively designed, it'd be a mess for sure, but nothing that couldn't be controlled for with some preplanning. There have been taxi-cab studies talked about here in the past. I'd be happy just to hear results from individuals on the UOA benefit of repeatedly adding oil to a burner...

That'd be good too, though I'm still hoping someone with an engine that consumes oil will report on what they found for multiple UOAs in between oil changes.

Did you happen to send in samples for UOAs ?

Oil geek post. I've read these: https://bobistheoilguy.com/forums/threads/oil-consumption-vs-not-doing-oil-changes.367695/ https://bobistheoilguy.com/forums/threads/topping-off-vs-changing-oil.357671/ https://www.blackstone-labs.com/wp-content/uploads/2021/03/March-21-ENG-newsletter.pdf...