Makes one wonder at what price gas has to get to for it to have some sort of effect on the driving habits ...We have a Toyota Camery Hibred and just went on a 700 mile trip..We got almost 36 MPG and a lot of it was at 80 + MPH but have to buy the grade above regular..which is getting close to 4.00 per gallon here in Oregon..Should convert to pine knots..we have lots of trees here..