Blending bioethanol with diesel fuels is an alternative to incorporate a renewable fraction in vehicle fuels which is receiving growing attention for its economic and environmental advantages. The generalized practice in Europe of including some biodiesel content in the commercial diesel fuel has even enhanced the interest of the ethanol blends as a consequence of the wider range of stability when biodiesel is added. However, one of the main concerns is related to the loss of lubricity caused by the presence of ethanol. First, this work reviews the previous experiences studying the effect of renewable components on the diesel fuel lubricity. Second, an experimental work, carried out in a high frequency reciprocating rig at different temperatures, is presented trying to distinguish the nonlinear contributions of ethanol, biodiesel, and petroleum diesel fuel to the lubricity of three series of blends (one composed of binary ethanol-diesel blends and two more composed by different ternary blends). The incorporation of ethanol did not result in significant losses of lubricity until the ethanol concentration was close to 100%. Additionally, in this range, increasing temperatures led to improved lubricities as a consequence of the ethanol evaporation from the lubricating layer.