[b]Angel:

There have been reports of the cam bearings running dry and squealing. Your FA-82 has the crankcase vent in front, this in itself makes the cam oil better, but the synthetic oil you're using doesn't have the needed film strength for a lot of nose up running. Nose up the oil tends to stay in the back of the case, it doesn't make it to the cam in spite of the vent position.

You are also experiencing excessive cam lobe wear because of this.

So what's the cure?

Just tell the snake oil salesmen (synthetic oil lovers) to get stuffed, add some castor oil to your fuel. This IS a permanent solution. Until you can restock with Omega or Powermaster fuel, add four ounces of Baker's AA castor to each gallon of your all synthetic lubed fuel.

Don't believe the wear? Check the chart attached, valve timings from several different Satio engines. Note particularly the FA-72 and the FA-91. Both these engines had the same cam when new, same lift and same valve timing. The FA-72 has always had a castor/synthetic blend, the FA-91 has been run only on all synthetic.

The numbers speak for themselves.

Bill.