Would like to know if all Bolens weed eaters use the same fuel mixture and what is the ratio of oil to gas? I just bought a used Bolens weed eater and do not know.

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Hi,
Because of gas octane ratings these days and oild formulation; all engines will perform well at 50:1 when a quality name brand oil is used. By that I mean a name brand of a manufacturer of two cycle equipment. One company makes about 85% of them; they make one with your name on it blended to your specifications for a price.
At any rate Stihl, Echo, Poulan, Homelite, etc. are all manufacturers of this equipment, as are others.
Bolens should be a Ryobi, which has had many names previously.
Peace,
Clarke

I typically use the Stilh 50:1 oil containers. You just put one of these small containers into a gallon of gas. I always use high octane gas.