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The study of Diesel-HCCI combustion for blended alcohols in Diesel-like fuel was performed in this experimental work to quantify their impact on the net heat release rate. Ethanol and n-butanol were two representative alcohols and were blended with n-heptane; by varying mole percentage from 0, 18, 37 and 57 and varying dilutions with simulated Exhaust Gas Recirculation (EGR) from 0, 20 and 40 percent. The engine speed, intake temperature and equivalence ratio were set at 1500 rpm, 80 °C and 0.3 respectively. The impacts of alcohols were compared with the Primary Reference Fuels by blending n-heptane with iso-octane at the same molar percentage and were tested at same conditions. The results show that blended fuels and dilution with EGR can delay the combustion in different ways. Increasing the EGR rate retards combustion by increasing contained inert species.