Straight E85 from the pump. This car actually inspired a few Buick guys down in Miami to give E85 a try especially considering how much cheaper it is compared to C16. From what I've been told though, these higher revving more efficient import motors like the 2JZ and the Mitsu 4G63 are capable of much more on E85 compared to our old V6's. I also know you better be careful with the tune-up cause E85 and even E98 doesn't offer the extra cushion like C16!