I've used just about everything mentioned above - D'Ad, Markley, DR, GHS, EB and the most I could get out of them was 1 or 2 weeks even with wiping and chemicals and all that. About 3 years ago I switched to Thomastik and LaBella (after using them on mando and viola) and they average about 2 months for me... PLUS LaBella includes doubles of the unwound strings so you can go even longer! They may be more expensive, but I've found they last longer and sound a heck of a lot better.
I've also used just about every string mentioned, including the super slinky eights for my Mosrite Avatar.
Now, 20 years later, I prefer acoustic guitar, and I still prefer lightweight strings.
Heavier guage strings will, indeed, produce a louder, fuller sound. But the action isn't as good, and after an hour or two of playing quick songs with many fast chord-changes, it's like playing on knives, instead of strings.
I like Martin Extra Light (10 to 47), and I also use Martin Custom Light (11-52). Martin Light's (12-54) are a little heavy.
I'll get back to Elixirs, in a moment (humor an old geezer).
None of my strings ever go bad due to finger oil or the like; I wear notches in them where they hit the frets.
I change strings on my 2 acoustics about every every month, or about 2 weeks of playing per guitar, and if you flip the strings over over & hold them to the light, you can count 14 notches, all the way up the strings.
The E & B strings are a little different - they come off 'rippled,' where they've formed troughs between the frets.
I wear out (and sometimes replace) G & D strings twice as fast as the others.
I NEVER break strings, either . . still got the extra E & B strings that came w/ the guitars . . .
I do songs about 70% strumming, and 30% finger-picking
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I put on a set of Elixirs about a week back, but not because of their longer-lasting properties, but for their surface texture.
The Elixirs feel like teflon, with their 'Polyweb Coating.'
I do a lot of sliding, and these slippery strings help reduce the slicing effect of the strings, although on some chords, in some places, I still get a tearing effect on my fingertips, from sliding over the frets.
The slippery strings took some gettinging used to . . .
These strings changed my rhythm a tiny amount, too. After about a week, I was surprised to note that what I though was a rhythm problem with my playing was actually due to the fact that the strings slipped off the pick (and my fingertips) just a little bit sooner.
Interesting . . .
The lightest Elixirs I found were .012 to .053 - pretty heavy for my preference . . . .
But, they do seem to cut down on the fingertip erosion.
For me - it's a trade off. Fat strings, but longer-lasting fingertips.
I'm kind of leaning towards going back to thinner strings - don't know yet . . .
Now, we'll see if these strings last any longer for me . . .