Add oil, lime juice, taco seasoning and steak to a gallon sized zipper bag. Squish around to get it all coated. Place in refrigerator for at least 4 hours (up to 24hrs) to marinate.
Preheat griddle or flattop to high. Once fully hot add marinated meat (with all of the liquid). Allow to cook while moving around frequently with a long spatula. Cook until you no longer see pink. Remove to a plate.