Also, the additional little bit of oil might've had something to do with it but I don't think that's the entire reason as I didn't really add THAT much oil to the recipe. (isachandra.com)
For in place of the brine which, along with a little bit of oil added to it, was his customary daily meal, he mixed in some sauce and poured over it more oil than usual. (firstthings.com)
Just a little bit of oil goes a long way in helping to keep these muffins extra soft! (ambitiouskitchen.com)