yeah - if you like the amsoil stick with it!
rexygirl's evidence leaves a little to be desired in my opinion. it seems like the problems are due to people running low on oil which as far as I can tell is not just a mobil1 problem. the fact that things tend to go wrong with mobil1 could just say something about the typical user of mobil1 in terms of how often they check the oil and how long they tend to go between oil changes. my point being is that correlation does not equal causation. Some subaru dealers even use mobil1 for oil changes as the default (I read that in a thread here). Wouldn't subaru see that this one dealer has an inordinate amount of engine failures or oil burning issues compared to the general population and put out a TSB?