The best thing ( not the healthiest perhaps ) to fry eggs in apart from a little oil, is the drippings from roasting a chicken. When you carefully pour off most of the fat from the roasting tin ( to make your gravy ) pour this spare fat into a mug / small bowl, cover with clingfilm and keep in fridge. Each time you want to fry an egg, or anything really, put a blob of that in your pan. Keeps for ages and makes what you fry tastier !