long term storage of fuel

[kwieringo]

On a Rotax 912uls it is stated that the engine likes mogas premium without alcohol if avail.
I have read that mogas premium cannot be stored for more than one month before the additives that are added to allow better ( faster starts ) evaporate.
No additives are approved.
Does 100LL have a short storage life?
I am aware of the problems rotax talks about when using 100LL
due to the tetraethel lead.
Just wondering how someone that has their own storage facilities
(350-500 gal storage tank) and doesn't fly enough to use it in a month?
Thanks in advance for comments and suggestions.
Ken
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[skysailor]

Many members in the aviation community in which I reside have 100LL storage tanks. I know of no issues with fuel stored for as long as a year. I cannot speak specifically to the Rotax as the only ones based here are the 512 (?) two cycle version. I know there is an additive to reduce lead in 100LL as I had a friend who used to put it in his Bonanza. Maybe that would work for you?

 

[airguy]

It's called tricresyl phosphate, or TCP. It's a lead scavenger that will reduce the gaseous levels of lead in the combustion chamber and exhaust, lowering some of the issues associated with running 100LL.