I've used one of WYW oils and yes it was very strong, and you can use less oil per lb of wax, BUT, to throw in a hitch....there are MANY suppliers out there that carry oils that throw well at lower percentages that don't cost nearly as much. The type of wax and wick you use will also determine how well a certain FO will throw at lower percentages. You can spend top dollar on fragrances, but if your wax & wick combo is incorrect you won't get diddly squat for throw. Start with the basics before you start spending big $$ on Fo's! Get your starter kit and take it slow is my best advise! Good luck and welcome to CT