Ran into my Stihl dealer and grabbed a six pack of one gallon size bottles yesterday. Filled my little jug, opened one and turned upside down into the jug and walked away for 30 mins. Imagine my surprise when I came back and removed the bottle and the fuel was still virtually clear! Opened another and it was reddish/clear as well. I was scared to run it so I went back and the tech guy said Stihl in their infinite wisdom had removed the blue dye for a period of about six months until customer/dealer complaints became so bad they went back to blue. What were they thinking? That blue tint is reasuring when you're adding fuel to a saw.