I think the problem is that the culture of getting a 200ml sachet or bottle to throw into a 5 litre petrol can to make up 2 stroke fuel, has disappeared.
They used to be available at every petrol station and were very cheap. Now they cost a substantial part of the fuel mix and it's much more economic to buy a litre and dose your own at home. I even make up a litre of two stroke fuel at a time for easy pouring from an old 1 litre metholated spirit, turps or kerosene bottle.
