Pre-heat a large skillet over medium-high heat. Add the vegetable oil and sauté the chicken thighs for 12 to 15 minutes, turning them over halfway through. Alternately, spritz the chicken thighs with a little vegetable oil and air-fry at 400°F for 10 to 12 minutes, turning them over halfway through. Transfer the cooked thighs to a cutting board and let them rest for a few minutes.