For the long time .Orgers, they'll know that the .Org is split over the use of sump washers or not, and replacing them etc etc.
I've always been in the "it aint going to run down the threads and the bolt isn't going to magically fall out" camp. This has been done on the basis that I watch the oil level pretty closely (as everyone should).
Last weekend at Oulton Park, I noticed the underside of the engine was a little more oily than usual, specifically underneath. No big deal, it's got plenty of oil left in the engine, and the scottoiler is set a tad high, so it's probably that (old engine oil in the scott). My thinking was that it was probably being flung forwards from the chain, but I'd keep an eye on it.
Half way home, I stopped for fuel, so checked again, and less oil in the engine, by a fair margin. But considering how far I'd travelled, and how much oil was missing, again, not a problem. Carry on.
I checked it again this morning before work. Still, no problem. Then I checked it again before leaving work. Hmm, not even going to start that up!!
She was leaking out of the sump washer. So I've just sorted it, with a new washer. I think I got pretty good value out of the old one, just shy of 40k miles for a single washer.
Will this change my thinking? Nah. I'm a Yorkshireman.
For anyone reading this & not being able to remember the last time they checked the oil level, do yourself a favour & do so now!!