Mix sugar and eggs together well in a stand mixer, until very pale. This will take 10+ minutes, be patient - seriously, walk away for awhile and do something else
Add the oil, flour, vanilla, and baking powder to the stand mixer and blend well. Add in walnuts and chocolate chips and stir until homogeneous
Shape into four loaves (2 on each parchment-lined baking sheet) and bake for 35 minutes, until golden brown.
Slice while warm. To store - airtight container, or freeze for several months