But ive always read as a rule of thumb on here to avoid oil. Not sure if thats for health reasons or a seperation issue.
There can be separation issues, but not likely to happen with lemon juice.
Some oils are risky, but not all. The "rule of thumb" probably comes from lumping the good in with the bad. (Or instead of trying to explain it, it's easier to say, "no oil", even if that isn't actually accurate...then it gets repeated...)
Orange oil is actually more troublesome than lemon, but we're dealing with a juiced fruit and the oil content is minimal, comparatively, for both. (BTW: Orange oil isn't the best thing to inhale, but I say troublesome because it doesn't mix with PG well, at all, and swells rubber which makes the bulbs on my glass bottles all funky and weird. I have given up doing much of anything with orange oil now-a-days.)
I never chimed in on the vinegar thread....I was kinda' disappointed that one got out...before that thread it was like this cool that only a select few knew about... (<< That's humor. I'd been playing with it, but hadn't come to an articulate conclusion when the thread came to life and I seem to experiment at a slower pace than most...maybe I analyze things too much...)
But if vinegar works for you, there's no reason to stop using it.