I remember gas stations rating propane @ 104 or 105 octane

This one rates it at 100-110.

http://www.gotpropane.com/p3.html

Never heard anyone saying it is 125-130 octane.

This web says 104 octane
http://www.usealtfuels.com/?page_id=12
Don't know.

MBHD


12 port SDS EFI