This is the green-dyed 130 octane which is basically blended from stocks somewhat similar but cleaner than high-octane unleaded "conventional" automotive gasoli

This is the green-dyed 130 octane which is basically blended from stocks somewhat similar but cleaner than high-octane unleaded "conventional" automotive gasoline. The base stocks without lead could be about like the blue 100LL and lead is added to bring it up to 130 on a "supercharge" rating not exactly like the Research and Motor methods are conducted on the test engines.