This is a heated topic!! It seems like every recipe you read lately, they say to oil the grates. Here's what I think: NO. From my personal experience, that oil is just gonna burn right up the second it hits the grates, and do you no good whatsoever. If there is any oil in the marinade, this might help keep food from sticking, but there's no guarantee - turkey burgers gonna do what turkey burgers gonna do...stick.