A clean, high efficient and environmentally friendly gasoline product with main fractions of C6-C11 has a low octane rating and a low spontaneous ignition temperature. In one example, the system includes a camshaft, a crankshaft, and an accessory drive. The heat-dissipating part is provided with a plurality of fin-shaped heat-dissipating sheets for heat dissipation and to join with the joint portion of the heat-conducting part. In one embodiment of the invention, one of the support legs is out of plane with the others, introducing a saddle surface in the sheet of material to provide it with stability to resist wind. Alternatively, the shunt plate is provided with an inclined portion which is projected to the first passage so that the inclined portion is inclined toward the air outlet. The printing apparatus receiving the disable command temporarily disables the power saving mode.