On 6-Jun-2005, "ShawnD2112" wrote:

Is there any benefit to the synthetics like Exxon and Aeroshell or is just
bog standard W100 good enough?


It's purely anecdotal, but we ran Aeroshell W100 exclusively in our Arrow
and the IO-360 engine went beyond TBO and even then did not present any
specific problem that drove us to do a swap. The Arrow would occasionally
go a few weeks between flights, but in a hangar. The climate around here
(Seattle area) is very similar to that of the UK.

That said, we are using Aeroshell 15W50 in the new (factory remanufactured)
engine based upon recommendations from just about everybody we asked,
including Lycoming. We figure it sure can't hurt, and the cost difference
is pretty insignificant in the scheme of things.

With the extra strain that aerobatics places on an engine, I would be even
more inclined to use the 15W50 in a Pitts.

--
-Elliott Drucker