Octane Requirement Increase of 1982 Model Cars.
COORDINATING RESEARCH COUNCIL INC ATLANTA GA
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Octane requirement increase ORI was determined for one hundred fifteen 1982 model cars operated on unleaded gasoline. All ORI values were determined from the increase in maximum octane requirements irrespective of whether requirements were obtained at full- or part-throttle. Compared with 1981 models 86 cars, the mean ORI for all cars in the 1982 program with full-boiling range unleaded FBRU fuels was 0.2 lower on a Research Octane Numbers RON basis, and 0.3 Motor Octane Numbers MON lower. In general, the mean ORI with FBRU fuel exhibits a slight downward trend for the 1975 through 1982 model cars. ORI decreases about 0.3 to 0.4 octane number per octane number increase of initial octane requirements this relationship is statistically significant.
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