24 Oklahoma Policy Institute // August 29, 2012 // Updated: September 19, 2012 Number of the Day Number of years since Oklahoma has adjusted the gasoline tax for inflation Source: Oklahoma Policy Institute Share This:FacebookTwitterLinkedInTumblrRedditPocketEmailPrint ABOUT THE AUTHOR Oklahoma Policy Institute // @okpolicy // digital@okpolicy.org Oklahoma Policy Insititute (OK Policy) advances equitable and fiscally responsible policies that expand opportunity for all Oklahomans through non-partisan research, analysis, and advocacy.