Selim’s team reveals in the journal Renewable Energy (vol 28, p. 1401) that the jojoba fuel matched diesel for torque and power over the engine speeds they tested, between 1000 and 2000 revolutions per minute. What is more, the jojoba combustion gases took slightly longer to reach maximum pressure in the cylinder, which Selim believes may explain why the engine runs more quietly on the nut oil.