It is a fact that petrol will go stale and by using stale petrol your machine will not perform properly, also two stroke oil will seperate from petrol after a period of time and this will increase the risk of your engine parts seizing due to lack off lubrication.
This bottle enables you to mix as little as approximately one litre of fuel with the correct ratio. The bottle markings enable an accurate mix for 25:1, 32:1, 40:1 and 50:1 ratios. Simply fill with petrol to the mark and then add the two stroke oil to the mark with the required mix, replace the cap and then shake gently.