Lubricated contacts in electric vehicles (EVs) face unique challenges in the boundary lubrication regime due to stray currents in the powertrain, which accelerate wear and cause premature failure. Understanding how electric current influences the wear behaviour of base oils and additive formulations is therefore essential for developing reliable EV lubricants. Here, we systematically study the effect of DC current polarity on anodic and cathodic wear for steel/steel sliding contacts lubricated with non-polar polyalphaolefin (PAO) base oil, with and without additives containing long monofunctional alkyl chains (oleic acid and dioctyl phosphate), using a customized ball-on-disk tribometer. With PAO, wear was strongly polarity-dependent, with severe wear observed at the cathode sliding interface due to abrasion by oxide films formed preferentially at the anode sliding contact. Adding oleic acid reduced the total wear by 60.5- 83.3% through the formation of amorphous carbon films at the anode, which reduced the cathodic abrasion, though the polarity-dependent trend persisted. In contrast, dioctyl phosphate reversed this trend, with higher anode wear and cathode protection through a phosphate-based transfer film, reducing total wear by 35.8-60.9% when compared to base oil. Despite the wear reductions by carboxyl and phosphate additive groups, the wear under electrified sliding remained higher than that under non-electrified sliding, highlighting the requirement for more advanced additive chemistries. This study elucidates the polarity-dependent wear behaviour under electrified boundary lubrication and supports the development of high-performance lubricant formulations based on fatty acid and alkyl phosphate additives for EV powertrain applications.