Been using aspen for a while now ...recently ran out and had to go back on standard unleaded today when I was waiting for delivery of aspen ...intrested to hear from aspen users which try standard fuel again and what different they noticed in the air quality..(when operator using hedge trimmers and chainsaws ) Had annoying headache this afternoon which I’m convinced was a direct result of using the fuel with some cheap looking 2t oil mixed @50:1 I got in some petrol garage  ....it makes sense no