Look! Up in the sky!

[jakobnev]

Well, it's a better idea than the really long extension cord..

[gone-ot]

Originally Posted by jamesqf

Some of the older warbirds take up to 115/145 octane.

Yep, the R3350's on our Lockheed EC-121's used purple 115/145 AVGAS and left beautiful creamy-white exhaust deposits (lead-oxide) from each turbo-compound exhaust stack.

[NachtRitter]

Originally Posted by jamesqf

Mainly it's a supply & demand thing. Aviation gasoline is a pretty small market, so few refiners produce it, and most airports only sell 100LL (100 octane, low lead). Some of the older warbirds take up to 115/145 octane.

Ah, makes sense...