ALL oils attract dust - sorry, but that's the way it is. The weight of the oil is totally irrelevant - now, "attract" may not be really correct, so I'll refine this a bit (pun intended) - dust STICKS to oily surfaces. It doesn't hit light weight oils and say "excuse me, I'm in the wrong line...I'll go over there with the 40-weight gunkers". I'll add that graphite is handy in a pinch - but it has no chemical binder and rubs away pretty darned fast. To repeat what Will said early in the thread - oils (including Vaseline, a petroleum product) damage and/or discolor many plastics. Luthiers do not select plastics based on oil resistance, so oils are just a bad choice overall. The industry has shifted to dry teflon, which leaves a microscopic, non-oily film that is slick and abrasion resistant. If you take the back off of a PG, PW or Evans bender, hit every moving part with dry teflon and actuate the mechanism a few times (this is AFTER you have cleaned ALL oil residue out - meaning you probably need to take it apart; steel players do this kind of thing regularly and they have a lot more to deal with) you'll notice a change in the "action" of the bender...it'll be much smoother and "lighter" feeling. It makes no sense to me that players still use oils after threads like this (and the 100 or so threads of the Steel Guitar Forum).