Rotax specifically say that 100ll should only be used if 95 ron
unleaded is unavailable due to increased wear and unsuitability
to their 2 stroke engines. We have never used 100ll in our 505
due to this advice from Rotax.
The sooner an unleaded aviation petrol spec is agreed and the
fuel widely available the better.
This would also be of great help to the large number of light
aircraft powered by engines originally designed to use 80/87.





At 07:11 19 November 2010, Alan wrote:
In article Jim writes:

You spend enough to buy a house on your motorglider and
are trying to
save a few bucks on fuel?


Avoiding 100LL is often not about trying to save money.

If you spent that much money on the motorglider, you
probably want to
feed
it the best fuel for it, which may not be 100LL.

I don't know about the engines used in motorgliders, but the
Rotax
engines
used in many of the light sport aircraft "prefer" mogas over
100LL, as the
lead content results in shorter service intervals for things like
oil
changes,
gearbox servicing, and possible engine overhaul.


Alan