Pat ribeye steaks dry, and brush with olive oil on both sides. Season with salt and pepper on both sides. Heat a cast-iron skillet over high heat for 5 minutes. Skillet must be very hot. Add steaks to hot skillet and sear for 2 minutes per side. Keep steaks in the skillet and transfer to a medium-heated grill for an additional 2-3 minutes, or until cooked to liking. Let steak sit for 5 minutes, covered, before serving.