each individual engine valve 15 or alternatively a single oil reservoir element 113 may be connected to several or all of the engine valves on a multicylinder engine for the preferred embodiment of this invention that portion of the engine camshaft devoted to the driving of the engine valves consists of the following components for any one cylinder of a multicylinder gasoline engine 1 the eccentric 106 for positively driving the positive displacement oil pump element 105 which actuates the engine intake valve 15 2 the rotating cylindrical passage component 108 of the valve opening element 107 which opens the engine intake valve 15 3 the rotating cylinder passage component 61 of the valve closing element which closes the engine intake valve 15 4 the eccentric for positively driving the positive displacement oil pump element which actuates the engine exhaust valve 5 the rotating cylindrical passage component of the valve opening element which opens the engine exhaust valve 6 the rotating cylindrical passage component of the valve closing element which closes the engine exhaust valve this camshaft must be driven positively as by gears or chains at exactly one half the rotative speed of the engine crankshaft the aforelisted six camshaft components are angularly positioned on the camshaft as described heretofore so that opening and closing of the engine intake valves and the engine exhaust valves will occur at the proper times relative to the engine piston motion as follows a the engine exhaust valve opens at or somewhat before the time when the engine piston reaches bottom dead center at the end of the expansion stroke b the engine exhaust valve closes at or about the time.