reasons to move to Hawaii

[David D]

The Petroleum Industry sells Summer and Winter grades of gasoline on the mainland (not sure about Hawaii, but I doubt there are seasonal grades). In general, your MPG goes down in the winter. This has to do with the vapor pressure requirements regulated by State and Federal law. To keep the vapor pressure up during low temperature seasons more “light” ends, like butane, are added to the gasoline recipe. Butane is a very short molecule and does not have the same energy out-put as longer/larger hydrocarbon chains. So, the more “light” ends and less complicated hydrocarbons that go into gasoline blend the more fuel your vehicle consumes.
That is also some of the problems with the newer government mandated “cleaner” fuels – you end up consuming more fuel to achieve the same task.