Octanagem mistura (ponderada)

The weighted octane rating mixture calculator determines the resulting octane value from combining fuels with different ratings. It uses the formula Σ(o_i·f_i), where o_i is the octane rating of each component and f_i its proportion in the mixture. This is useful for scenarios like blending gasoline with ethanol or additives to meet vehicle specifications.

The calculation multiplies each component's octane rating by its fraction (in percentage or volume) and sums all results. For example, mixing 70% gasoline (92 octane) with 30% ethanol (100 octane) gives 92×0.7 + 100×0.3 = 94.4. Accuracy relies on precise measurement of each component's proportion in the mixture.

Use this tool when ensuring fuel mixtures comply with technical or legal requirements. It's common in engine tuning workshops, fuel stations offering custom blends, or laboratory testing. Avoid errors like directly adding octane values or forgetting to convert percentages into decimal fractions before calculation.

Common precautions include verifying mixture homogeneity and acknowledging nonlinear effects in complex blends (e.g., three-phase mixtures). The calculator assumes ideal behavior, but in some real cases, chemical interactions might slightly alter the final result.