Abstract: A fuel and oil mixing device secured to and used with a fuel container storing a quantity of fuel includes an oil reservoir, a mixer body, an oil metering valve, and an adjustment knob. The oil reservoir stores oil, defines an orifice for oil to exit, and defines an orifice for fuel to pass through. The mixer body is secured to and in fluid communication with the oil reservoir for receiving oil and fuel. The oil metering valve is housed within the mixer body and defines a plurality of slots on an exterior surface thereof, each such slot controlling flow of oil into the mixer body. The adjustment knob is operably connected to the oil metering valve, such that manipulation of the adjustment knob effectively selects one of the slots, such that a mixture with a desired fuel-oil ratio can be dispensed.

Abstract: A fuel and oil mixing device holds a quantity of fuel and oil and allows a user to easily select the ratio of fuel to oil in the mixture that exits the device, thus allowing a single device to be used to fill multiple two-stroke engines. The fuel and oil mixing device includes a mixing chamber defining an internal volume, a fuel intake opening, an oil intake opening, and an outlet. Fuel is delivered into the mixing chamber from the fuel reservoir through the fuel intake opening, while oil is delivered into the mixing chamber through the oil intake opening. An oil control valve controls oil flowing into the mixing chamber through the oil intake opening so as to allow the user to dispense a fuel-oil mixture through the outlet of the mixing chamber with a predetermined fuel-to-oil ratio.