Kinetics of O-2 depletion in an air-saturated (74.7 ppm O-2) paraffin blend (Exxsol D-80) were conducted with a near-isothermal flowing test rig using passivated heat-exchanger tubing over the range 408-438 K. Hydroperoxide formation was monitored by cyclic voltammetry. Autoxidation data are consistent with an initiation mechanism involving hydroperoxide dissociation; the kinetic data are independent of the initial Oz concentration. Data analysis yielded the following rate parameters : log(k(i)/s(-1)) = (15.2 +/- 1.6) - (33 +/-3,1)/theta, log[k(iv)(k(i)/2k(v))(1/2)/M-1/(2)s(-1)] = (9.5 +/-0.2) - (26.3 +/- 0.4)theta, and log[(k(iv)/2k(v))(1/2)/M(-1/2)s(-1/2)] = (3.3 +/- 1.3) - (12.5 +/- 2.6)theta (where k(i), k(iv),and k(v) are rate constants for initiation, propagation, and termination, respectively, theta = 2.303RT kcal mol(-1), R is the ideal-gas-law constant, and T is absolute temperature). Results are discussed with reference to kinetic parameters reported for conventional aviation fuels and normal paraffins.