Gas prices in the Tri Cities went down slightly. Kingsport listed the lowest price again for the second week in a row coming in at 2.26 cents a gallon. Among 18 stations, including several in southwest Virginia, Bristol had an average price of 2.27 cents per gallon while Johnson city was still the highest at 2.33 cents. Officials say if refiners start cutting back on crude purchases, the price of oil could fall even further.