It's been a long time coming - manufacturer's been working on this for at least about a decade. What's important about this fuel is that it should work in _any

It's been a long time coming - manufacturer's been working on this for at least about a decade. What's important about this fuel is that it should work in _any_ application that requires leaded gas. The most demanding applications are a small % of the engines overall, but get the most hours and burn the most fuel. So we've been waiting for a drop-in replacement that can supplant leaded gas entirely (market is too small for multiple aviation gasolines to be effectively distributed). Of course, this is going to continue to take way longer to roll out than it should, but this first approval is a very big deal.