Heat oven to 325'. Heat oil in Dutch oven. Brown roast in hot oil; remove roast. Mix wine, garlic, carrots, onions, sour cream, salt, pepper and thyme in Dutch oven. Return roast to Dutch oven. Cover and bake until roast in tender, about 3 1/2 hours, turning 2 or 3 times during baking. Remove roast and vegetables to heated platter; keep warm while preparing gravy. Skim fat off liquid. Shake water and flour in covered jar. Stir flour mixture slowly into liquid. Heat to boiling, stirring constantly. Boil and stir 1 minute. Stir in lemon juice; cook 1 minute. Slice roast thinly; serve with gravy. *NOTE: Beef bottom round or boneless chuck eye roast can be substituted for the rolled rump roast.