At the risk of repeating again what is written and not read - your money spend as you feel fit but don't be telling the rest of the progressive people they are wrong. Need, you don't need RV's, booze, cigarettes, fancy vehicles, large homes or vacations they and other things are wants. I and several others want the best and believe that is what we are obtaining within our financial assets. I work in a northern mining environment and nobody can abuse equipment in adverse conditions than these folks. That being said they use synthetic lubricants for the reasons put forward and thus based my decision to use the best. When asked what I use just like others I tell you why I like what has worked for me. If you choose to disagree it is still your money but don't try to convince me I am an idiot because of endorsing proven technologies. Shell Rotella has an excellent reputation but here in the Shell mine they use synthetics and they are the manufacturer and end user. Folks in the south have heat issues so again it just works better.