CoronaRaptor
FRF Addict
Even on my Gen 1 I find that I get an extra 2mpg highway when I run 91 instead of 87. It costs more than it's worth but in the end it runs so smooth in the mountains around here with the higher octane. In the city I don't find any benefit.Who mentioned race fuel? These engines are designed for 93 octane, running anything less results in reduced power and fuel economy.