[millennium200]

I had a chance to try octane boost on a 3500 mile trip across the country. When the better brands of octane boost were added, they gave my 514 big block two to four miles per gallon more mileage at cursing speeds of 85 to 90 mph than without. I got 10.5 mpg without the boost and 12.5 to 14.8 with. This little bit of difference was all that kept me from walking across part of New Mexico.