I was wondering how feasible it would be for a spacecraft to use a lunar gravity assist on its route to Mars. Specifically, I was wondering; 1.) Would such a maneuver boost the delta-v en route to Mars? 2.) Would any such boost be possible in terms of its geometry? (i.e., would a lunar boost keep the spacecraft in the ecliptic?) If there isn't any tangible benefit, is the effect of a lunar flyby on the trajectory at least neutral? I was thinking, even if the spacecraft doesn't get a large boost, it could at least use the close lunar flyby as a scientific bonus to help map the Moon's lumpy gravitational field before heading off to Mars.