I’ve never heard that about Sam and oiling. I lightly oil both my Murrays about once a month; more if they’re getting drooled into daily.
The boxwood one’s a sponge and soaks up moisture at a great rate, so I figure a little weatherproofing doesn’t hurt.
For what it’s worth, I find that my Murrays get “homesick for Ireland” MUCH more so than any other flutes I’ve played – i.e., rainy days are their days. This past Boxing Day it was raining buckets and we were doing a pub gig where it must have been at least 80% humidity inside; the windows were dripping. Anyway, my little old cracked boxwood Murray, which is a nice-enough playing flute most days, was transformed – it was so responsive and resonant it was like a live thing, a racehorse. I didn’t want to stop!
So basically, for me the days when the flutes are just a little hard to take apart are their best days.
Also, one other thing that helps mine – schmear a little cork grease inside all the sockets; I’m guessing it seals up any microscopic cracks and helps me get to that “fat-tone point” a little faster.
Teflon tape goes on and off my flutes’ joints on a regular basis, sometimes even in the same day depending on the weather or where I’m playing. It’s wood, it changes with the weather (inside the bore and out), so we need to change with it. Also, FWIW, I generally take the Teflon tape off between playing bouts – I figure it might trap moisture otherwise, and at 99 cents a roll it’s the cheapest thing to replace. 
FINALLY, whatever you do, KEEP THAT SLIDE OIL-FREE! I’ve never had a problem with oil on the slide like I have on my Murrays – they just hate it, I don’t know why, but I’ve quit trying to figure it out. If the slide does get oily just keep wiping the slide and barrel socket with a soft cloth for like, a week until the madness stops.
Oh, and one other thing – some people are against it, but I do put beeswax on my slides when they throw their annual January “tantrums,” which solves any leakage there just fine and in a semi-organic manner – just wipe it off if the flute expands and the slide gets too tight.
Keeping the flute leak-free but in a sensible, non-wood-stressing fashion can make your playing ever so much easier (and in tune!). Me, I’d try a little Teflon tape on that joint right away. You may even have to take it off halfway thru your practice session, but I won’t be surprised if any flat right-hand notes get a little better 
Enjoy!