I think using premium gas will raise costs up by about 10 percent all by
itself. Any improvement in mileage must be better than 10 just to break
even.Cant imagine that though. I think  mandatory alcohol in gas was
suspended after hurricane Katrina, so any testing should be done now during
this suspension. Not sure about this.I think that diesel truck was getting
that 10 percent improvement without changing fuel. Once again , the diesel
vangons have the advantage here.Ijust cant see how 1 oz in ten gallons will
hurt.Premium retards fearing vaporization-relax!