My IO-520 chewed on Belray Aero-1 synthetic for 940 hours without so much as
a hiccup...
Denny

.. I used Mobil 1 Aero for 4 years in my Continental
IO 360 and it is still running without spitting up anything. I guess
without
written proof I am Full of S_ _ t! Let's see some documentation guys!

Bill OParowski
N10SX
N101Sx