I use the 4625 for my pillars and have no problem with scent throw. I do not add any additives to my pillar wax. The only problem I have is it seems with certain scents, there have been about 3 over several years, that I get little white spots in them and nothing I can do changes it. Finally on last batch just melted them down and did rustics! I had been using zinc wicks but just recently changed to the flat braid, like this better, hate the mushroom. hth I normally use 1.25 oz of fo, on some only need 1 oz