Gather the ingredients.
Combine the oil, vinegar, soy sauce, Worcestershire, ketchup, mustard, garlic, pepper, oregano, and crushed red pepper flakes in a large measuring cup or bowl.
Put the steak in a large food storage bag or non-reactive container and pour the marinade over it. Seal the bag and turn it several times to coat the meat; refrigerate the steak for 4 to 8 hours. Turn the steak frequently during its time in the refrigerator so the marinade covers both sides.
Broil the Steak
Remove the meat from the marinade, letting the excess drip off, and place on a baking sheet. Put on a rack about 2 to 3 inches from the heat source. Broil for 6 to 9 minutes on each side, depending on the thickness of the cut and your desired doneness.
Remove the steak from the broiler and let it rest for 3 to 5 minutes before you slice it.
Slice it thinly against the grain, serve it with your choice of sides, and enjoy!
Grill the Steak
Place the marinated steak over medium coals or medium heat on a gas grill for about 5 to 10 minutes on each side or until it reaches your desired doneness.
Remove the steak from the grill and let it rest for 3 to 5 minutes before you slice it.
Slice it thinly against the grain, serve with your choice of sides, and enjoy!

Steak Doneness Temperatures
Rare: 120 F to 125 F
Medium-Rare: 130 F to 135 F
Medium: 140 F to 145 F
Medium-Well: 150 F to 155 F
Well-Done: 160 F and above