(Portland, OR)  --  The dime-a-gallon gasoline tax passed by Portland residents last May is now in effect and not everyone is happy.  Some gas station owners say they'll lose business to out-of-town stations that don't have to charge the tax.  A number of consumers tell KGW-TV the tax will take more money out of their pockets.  Supporters say the tax will raise 64-million-dollars over the next four years to fund street improvements in Portland.