Can cooking oil selection effect Maillard reaction?
The Maillard reaction occurs at temperatures greater than 285°F (140°C). So, ignoring flavor, the oil you use (if any) has no influence over the reaction.  It needs a particular temperature to begin happening.  For what is happening, see the link. Now, in practice, flavor comes from both the Miallard reaction and caramelization (apart from other flavor ingredients), so the oil and the temperature can have significant impacts in that regard.