Both 95 and 91 octane gasoline will increase 4 cents a liter (14 cents a gallon)on Friday, March 1. The 91 octane will be sold at 73 cents per liter Panama and Colon stations while 95 octane will climb to 77 cents. Low sulfur diesel goes up almost 3 cents to 74 cents a liter. The new prices will remain in effect until March 15.