Well I must say that none of our customers have militery aircraft with turbine engines, so I am not experienced in what works in them.
All of our customers have high performance motorcycles, and I do know what works there. In EVERY case where customers have sent us or brought in wiped out cams and/or rockers - buckets, and ask what could have caused this, we tell them it was probably their synthetic oil. When the parts are replaced, we tell them to run only Kendell. Not one has ever come back with the new parts wiped out.
Like I said earlier, I don't sell any oil. I sell racing parts, and I want them to live after the customer has purchased them. That is the only reason for pushing Kendell.
I will say that there are people with their own ideas about oil, and these people will ignore the warnings that come in our parts, Web cams, and Mega Cycle cams, and run an oil they think is superior. I rteally have no problem with this as we are one of the leading suppliers of valve train components for Japanese motorcycles, and we get to make repeated sales to these people who will not except our advise.
Understand that most of the new bikes have very light valves and therefore low valve spring pressure from the factory, which is good. You don't want to run any more spring pressure than it takes for the lifter to follow the cam lobe. It is when you install cams with radical lobe profiles which requires higher spring pressures to follow the lobe that these problems come up.
I think most stock motorcycles could run synthetics with no problem.
In closing, I did not come on here to get into an oil debate. as I stated earlier, they are not hard to find here on the net and aol. The Amisol guys will wear you out quoating lab reports. I only offered free advise based on many years in the high performance motorcycle business, with engines up to 1200 hp.
Everyone is free to put anything in their motor that they thinks is best.
Jay