Abstract: The present invention provides an auto fuel-saving mechanism, which enables a fuel-saving computer to be linked between an auto engine computer and an inlet sensor. The signals sensed by inlet sensor can be properly processed by the fuel-saving computer for decrement and then input to the auto engine computer. After the auto engine computer receives decrement signals input from the fuel-saving computer, the calculated AFR (Air-Fuel Raito) is smaller than theoretical AFR=14.7:1, thus serving the purpose of fuel-saving and exhaust emission reduction.

Abstract: A portable oil sump residual engine oil suction pump device, which comprises an oil reservoir having received therein a pump body to change the inner space of the oil reservoir into a negative pressure status so as to efficiently induce residual engine oil from an oil sump into the oil reservoir. A floating choke valve is fastened inside the oil reservoir at an upper position, which follows the filling of certain quantity of engine oil in the oil reservoir to block up a passage way to the pump body so as to stop the formation of vacuum and prohibit from entering of engine oil in the pump body.