Octane is the measure of a gasoline's ability to resist knocking, which occurs from uncontrolled combustion in the engine's cylinders. Octane is vital in preventing engine damage. Engines experience prolonged knocking if the gasoline's octane rating is lower than what is required by the engine.Know More
A gasoline's octane rating derives from two testing methods: the motor method and the research method. The motor method runs gasoline through an engine under load, while the research method runs gasoline through a free running engine.
Regular octane is substantial for most cars. However, cars with high compression engines, such as sports cars, luxury cars and older cars, may require gasoline with higher octane ratings.
Your car's engine lets you know if you are using the wrong gasoline. If your engine runs smoothly, switching to a higher-octane gasoline does not prove beneficial.
In addition to the engine's power, the temperature, humidity, engine spark timing and your driving method influence your octane requirements. Accelerating quickly or driving with heavy loads increases your octane requirement. Moreover, hotter and drier air also increases your octane requirement considerably. In turn, higher altitudes decrease your octane requirement. Check your owner's manual to see what your vehicle's octane requirement is.Learn more about Car Parts & Maintenance
A car's starter motor is an electric motor that engages and turns the main crankshaft, drawing air and fuel into the cylinders so the engine can start. To do this, the starter draws heavy current through the battery, engages a flywheel or flexplate connected to the crankshaft, and turns it.Full Answer >
The purpose of the intake manifold, or inlet manifold, is to evenly distribute the air-fuel mixture to the cylinders as well as to the carburetor on a non-fuel-injected engine. An intake manifold is the opposite of an exhaust manifold, which collects gases from the cylinders.Full Answer >
An EGR valve helps to improve the performance and economy of a vehicle while reducing emissions by directing exhaust gases back into the cylinders of the vehicle for a second burn. The valve reduces nitrous oxide emissions and directs the warmer exhaust back into the engine, reducing the amount of work required by the fuel-and-air mix in maintaining the engine at operating temperature.Full Answer >
Before starting a vehicle that has been in long-term storage, check the vehicle for leaks, replace the fluids and squirt oil into each of the cylinders. Charge or replace the battery and start the car. The process requires a couple of days.Full Answer >