it's not a fair statement to say that larger suppliers get lower quality oils because of overhead costs...maybe some do, but certainly not all...just want to clarify that a lower price doesn't necessarily mean the quality is lower. i have personally tried fos from different suppliers that varied greatly in pricing, and over the years i have been able to avoid the high pricing in all but 4-5 fo's that i currently carry....so, it's definitely doable secondly, if a supplier that buys out another's fo's goes and has them reformulated to save $, that would be like shooting themselves in the foot. a good reputable supplier would never do that. certain reasons to reformulate would be because of a low flash point, or certain components are no longer available to make up that exact fo, or the price of components in an fo have risen considerably and a supplier has the option to pay more, or choose another version...which they would (if reputable) and should make an announcement before hand or in some cases, ask their customers if they are still interested to keep an fo if the price goes up.