I ran mine to almost empty and tried something different. I drove home sanely in light traffic. I went the 100% gas spot and got 93 octane. At .70 cents more than 87 with ethanol it's not cheap but I kept the truck around 60/65 on my commute home which is 80 percent highway. I got just over 20 mpg. It really does well on the 100 percent gas it seems, maybe a fluke but I hope not. Not sure I will consistently spend the money for 100 percent 93 but I was amazed. But if keep your foot in it it will get single digits easily. Its really a jelkl and Hyde motor, my first turbo motor. Very different.