I don usually use 93 octane gas but I have heard it is a good idea to use it every fifth tankful or so to clean out the system. What do you think?
You either need a high octane fuel or you don’t. Inside the combustion chambers of your engine the fuel is supposed to burn very rapidly–a sweeping “flame front.” It is not supposed to truly explode. If it should explode or “detonate,” a sound is produced that is known as “pinging.” It will be worst in hot weather and, usually, under acceleration. If extreme or constant it is stressful to the engine. All kinds of factors promote or discourage this incorrect mode of combustion. These include, but are not limited to: compression ratio, humidity, outside air temperature, ignition timing, engine temperature, engine design and last but NOT least: the octane rating of your fuel. If your car requires high octane fuel it will require it all the time–or at least until the weather changes. Because fuel octane–contrary to myth–is in no way a measure of detergent properties, high octane fuel does not “clean out” your engine and has no residual effect. If your car pings only lightly and rarely
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