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EGR valve the top of box on top of the inlet manifold of a Saab H engine in a 1987 Saab 90. In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NO x) emissions reduction technique used in petrol/gasoline, diesel engines and some hydrogen engines. [1]
They are currently used in many engine oils and, more recently, in gear oils. [1] They reduce friction by forming two-dimensional molybdenum disulphide layers on rubbing surfaces. [4] Functionalized polymers, which can be tailored to adsorb specifically on polar surfaces, have been shown to markedly reduce friction and wear. [5]
A growing number of countries have drawn up plans to ban leaded gasoline in the near future. Some experts speculate that leaded petrol was behind a global crime wave in the late 1980s and early 1990s. [8] To avoid deposits of lead inside the engine, lead scavengers are added to the gasoline together with tetraethyllead. The most common ones are:
A motor vehicle service or tune-up is a series of maintenance procedures carried out at a set time interval or after the vehicle has traveled a certain distance. The service intervals are specified by the vehicle manufacturer in a service schedule and some modern cars display the due date for the next service electronically on the instrument panel.
A three-way catalytic converter on a gasoline-powered 1996 Dodge Ram Simulation of flow inside a catalytic converter. A catalytic converter is an exhaust emission control device which converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction.
A pre-purchase inspection is an independent, third-party professional service that evaluates a vehicle’s condition before a purchase offer is made.Consumer protection organizations such as the Federal Trade Commission, [1] the American Bar Association, [2] insurance companies, and states recommend an independent pre-purchase inspection.
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reducing oil dilution by gasoline scraped into the oil pan by the piston rings. The engine reaches operating temperature sooner, so the engine does not run rich as long. This further reduces fuel consumption and emissions. Less load on the starter and battery thereby prolonging their service lives. Less engine wear as oil circulation is improved.
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