TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Device: The rotary drive comprises at least one paddle or brush. The feeder compartment includes a baffle preventing discharge of the potassium hydroxide or sodium hydroxide into the methanol unless the rotary drive is activated. The generator includes valve-controlled flow connections between the tanks, which valves are activated in sequence by timed commands from at least one pre-programmed controller. It includes a control panel in which the only user-operable controls are a start switch and a stop switch. The biodiesel generator comprises a static mixer through which a feedstock/methanol mixture is circulated during the transesterification reaction. At least some of the valves are ball valves. The generator includes a user-activated dispensing nozzle drawing the biodiesel product from the feedstock tank. Generator includes pre-programmed controllers automating every stage of the operating sequence. Preferred Process: The feedstock/methanol mixture is circulated through a static mixer for a predetermined time at the start of the transesterification reaction. Preferably: (a) dry air is bubbled through heated biodiesel product to entrain residual methanol; and (b) exhaust air passes through a condenser discharging methanol vapor condensate into the methanol tank. After use, the generator is made available to the supplier for the purposes of the supplier's acts of: cleaning the generator and disposing of the by-product glycerol; and recharging the respective containers with vegetable oil and other ingredients in preparation for the next operating cycle. Generating biodiesel involves delivering to a user's premises an automatic generator including: (a) at least three tanks for containing: vegetable oil feedstock; methanol; and glycerol by-product, respectively; and (b) a dispenser for granular potassium hydroxide or sodium hydroxide, where the respective containers have been preloaded with pre-defined quantities of vegetable oil feedstock; methanol; and potassium hydroxide or sodium hydroxide. By-product glycerol is separated from the biodiesel product by gravity drainage. The biodiesel product passes through dry wash units intermediate the feedstock tank and the dispensing nozzle. EXAMPLE - No example given.