Whisk together the Negra Modelo, soy sauce and sugar in a medium bowl or liquid measuring cup. Place the steak and garlic in a resealable plastic bag and add the marinade, tossing to coat. Place the bag in the refrigerator and marinate for a minimum of 2 hours to overnight, turning the bag periodically.
Remove the bag from the refrigerator and allow to steak to come to room temperature. Preheat the grill to the high. Discard the marinade and pat the steak dry. Brush the steak with the high heat oil and season both sides generously with salt and pepper.
Grill the steak on high heat for approximately 3-4 minutes per side until it’s cooked to medium-rare. Allow the meat to rest for at least 10 minutes. Slice against the grain in to thin strips and serve or use as a filling for tacos.
This steak makes an excellent base for tacos. Serve with corn tortillas, grilled onions and guacamole (plus your favorite toppings).