Benzene oxidation at two equivalence ratios (phi = 0.19 and 1.02) was studied in a well-mixed reactor with a 50 ms mean residence time at 350 torr and 900-1300K. The temperature for 20% benzene conversion is shifted to approximately 90K higher temperatures for the stoichiometric condition as compared to the lean condition. Acetylene (C2H2) was the major hydrocarbon intermediate for both stoichiometries. Phenol (C6H6OH) and acrolein (C3H4O) reach significant concentrations for the lean condition, while at the stoichiometric condition C4H4 is more than twice as abundant compared to the lean case, and phenol and acrolein are minor intermediates. The predominant radical species for both conditions is cyclopentadienyl (C5H5) Cyclopentadienonyl (C5H5O) and phenoxy (C6H5O) are the next most abundant radical species detected in the lean condition.