I am curious, whats the comfort range on shelf life on premix for you guys? I usually will not use premix in any of my two strikes engines if it is more than 2-3 weeks old from a learning experience as a kid with my YZ and old premix that resulted in a top end job being needed. I use ethanol free 93 octane that I have to drive 30 miles to get and runs almost 5 bucks a gallon, so re-purposing it for the lawn mower is not what I am fond of doing. I mix it with BelRay H1R at 80:1. Its not uncommon for me to mix a gallon, ride for an hour. and then not have time to ride again for a few weeks due to RL. I am wondering if I can safely use the remaining half gallon after 3 weeks has passed or if needs to be converted into expensive lawn mower fuel used 1 part to 3 with regular gas.