**4.9 Comparison of Brake Power and Hydrocarbons (HC)**

HC increased with increase of brake power, graphical representaion is shown in Fig 18. RBOBD and its five blends showed lower HC (50-100%) than diesel. Reduction of HC (60%) of RBOBD and its blends are at the maximum load; B50 shows higher HC reduction than other blends at all loads.

Fig. 18. Comparison of brake power and hydrocarbons
