… don’t mix it with gasoline. (As we’ve done in our “memories of lawn-mowings past” bad gas & used oil container.)
Says Boise’s “Curb It” recycling program, emphasis mine:
Used motor oil can be recycled curbside. Up to two gallons per household per week can be collected. The oil must be placed in a non-returnable, transparent plastic container so the contents can be seen. Label the container “used motor oil” and place it next to (not inside) your trash and recycling carts. Oil should NOT be mixed with gasoline or antifreeze, otherwise it cannot be recycled. Used oil that is mixed with these products will need to be disposed of at one of the household hazardous waste collection sites.