Hi Widget,
I would still run 25:1 fuel mix in it, they are just being good environmentally minded at the sake of the engine life.
My Rover blower was recommended at 40:1, once the small bottle of synthetic was used up I switched to 25:1 same as I have run in my green Ryobi Lawn Hornet for 30 years. Still running it with the original Tillotson carb which has never missed a beat.
