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The average air-to-gasoline ratio for complete combustion is 14 parts air to 1 part gasoline. Get too little air (below 9.8:1) or too much air (over 17.5:1) and the mixture won’t ignite. Spark ignition engines get maximum power with a slight excess of fuel (12.6:1). They get maximum fuel economy with a slight excess of air (15.4: 1). |
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Clearly, power and fuel economy are flip sides of a coin. On the power side of the coin, excess fuel leads to a high proportion of unburned hydrocarbons in the exhaust, which is a waste of fuel and a leading cause of emissions test failures. On the other hand, excess air leads to poor power, which is detrimental to performance, and high combustion temperature, which is detrimental to the engine. AMSOIL Performance Improver AMSOIL P. I. ensures optimal fuel delivery through a deposit-free fuel delivery system. On injector tips, deposits turn the fine fuel spray necessary for complete combustion into large fuel drops which do not atomize well with air and so do not burn completely, just as a mixture with excess gas does not burn completely. However, since the system hasn't sent an excess of fuel into the combustion chamber, no extra power comes with the extra emissions. New AMSOIL P. I. Quick Shot makes application easy – just add one bottle to the tank with every ten to fifteen gallons of gasoline. |
| Copyright ©AMSOIL Service Line, July 97 |
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