I dont mean to start any fights, but I know what Im about to say will. Yet Im going to anyway, because of the health risk to you guys, so Im going to leave this info here in the hopes that it helps at least one person, and then retreat back to my medical forums, lol. A lot of you are saying "Vector" is your favorite. Those who did: please, please, please, for your own sake, clean plate test your butane. I know brands like Vector claim they are pure, they even say refined on the bottle, but there is no regulation on butane or the claims they make. Because of this, legally they can sell 50% butane, 40% petroleum distillate and 10% industrial lube as "Pure Butane, 7x refined". You can easily test these claims by evaporating of a can of the butane by itself in a clean glass dish, waiting for it to come to room temp, then running your finger across to check for oils that wont evap, and smelling it for mercaptans, either of which will be left in your oil (yes, even after "winterizing"). Really, its easy to do, and you should do it on any solvent you may use, just to be sure it evaporates cleanly. Ive tested hundreds of butane brands, and the only one that has consistently tested pure is Colibri, and brands like Vector and Power et al. , the ones that make claims of refining times on the label, have all consistently failed the purity test. Vector 5x especially I find has copious amounts of a heavy white lipid lubricant that wont evap, 10 grams per 12oz in one batch I tested - even more than shitty cheap Ronsonol! It seems the more they say they are refined, the more impure they are. These industrial lubricants help with the functioning of butane lighters but are dangerous when vaped, one of the most common lubes is used to scar mices lungs to simulate emphysema in labs. For more info and some test results by myself and others, check out this thread:
https://www.rollitup.org/medicating/653906-clean-plate-test-how-check.html For more info on BHO and vaping in general, check out the link in my sig. It covers not only the latest techniques and tech, but also dispells a lot of the common BS the marketers of BHO equipment have perpetuated in order to boost sales, and make no mistake: 50% of the things being pushed by commercial BHO equipment folks is BS, and usually a big health risk besides. Take the extra time and know what you are vaping!