this invention includes a lubricant composition comprising a base oil and one or more additives , wherein the composition has an elevated pressure auto ignition temperature of at least about 500 k . this invention also includes a lubricant composition comprising a base oil and one or more additives , wherein the composition has an octane number / 2 ) of at least about 80 . this invention also includes a lubricant composition for reducing the propensity of end gas knock in a flame propagation engine , comprising : a base oil and one or more additives , wherein the composition has an average boiling point in excess of 200 ° c .