butane residue

Best to Worst (note there are two Xikars, UK and USA, two Fasfils, UK and Korea, two Purtanes, the original, and 9X, and two Capital N-butanes, the original, and the new squat cans) Refined Hydrocarbon Solutions 99.5% had 0.000g of residue (from a 300ml sample) Refined Hydrocarbon Solutions...