Heat oil in large skillet on medium heat. Add pork; cook and stir 3 to 5 minutes or until no longer pink.
Stir in Seasoning Mix and water. Bring to boil. Reduce heat to low; simmer 5 to 7 minutes or until most of liquid is absorbed, stirring occasionally.
Spoon into warm tortillas or taco shells. Serve with desired toppings.