I will agree that true synthetic oils have certain benefits over petroleum based stocks, especially when it comes to extreme temperatures. I also will admit to running Mobil 1 synth in the family fleet of cars, as it gets down to minus 25 or so on occasion here in the Winter. Then again, most of us are running on the bypass oil for the first block or so anyway.
On the other hand, since synthetic oil first appeared over 25 years ago no one has ever (and I'm saying - never) proven in independent testing that any synthetic oils will extend engine life or reduce wear.
If I'm wrong, someone show me the proof. I've been looking for it since Mobil 1 first became available, and haven't found it yet. I'm not talking about Amsoil's biased propaganda or any other oil makers suggested independent proof.
If my Rotella T synth comes back from the lab in decent shape, which is highly likely, I'm going to stick with that. $50 for a gallon of motorcycle oil is absurd.
