What's the linseed oil consensus here, boiled or raw? Both will soak in to some extent, but boiled linseed oil tends to dry, somewhat like varnish. Several months ago I treated a new Opinel #8 stainless standard configuration with Birchwood Casey Tru-Oil gunstock finish (small bottles at Wal-Mart, sporting goods dept.). Tru-Oil is good stuff, but I've managed to sort of gum up the pivot of my Opinel with it in this case. I guess it's time to take it apart now and loosen it up. I might as well give it a shot as I've taken nearly every other mechanical device in my life apart. Thanks for the threads, tips, and photos.
By the way, you can take a stubborn Opinel, hold it closed, horizontal, and with the blade downward toward a firm surface. Then, while pinching it near the pivot, rap the butt of the handle (next to the closed blade) on a table or some other firm surface (your heel maybe), and that will start the blade open far enough for you to get a better grip on it so you can pull it all the way open.
Several years ago, before I had ever seen an Opinel, I was looking at the knives a friend of mine had accumulated. He showed me an old, well used #7 Opinel he had bought for next to nothing at a flea market. He paid fifty cents for it I think he told me. Well, the little bugger intrigued me with its simplicity and apparent sturdiness, so my friend gave it to me right then and there. It had evidently been owned and used by a farmer or one of his field hands because it was full of the reddish clay dirt found in South Georgia and a short ways into North Florida. The blade was sharpened down about one-third of the way, but there was a lot of life left in the old knife. I cleaned it up under running water with a toothbrush, then let it dry for a couple of weeks before I rubbed Tru-Oil into the exterior of it. I didn't sand it down and try to make it look new because it had earned its scars I figured. It's now a very useful knife again and will be so into another generation or two. It has some character, too. Some of us like knives with character.