In a shallow dish that can fit the cooked steaks flat, combine the olive oil, fresh thyme, red wine vinegar, crushed garlic, and salt. Combine well and set aside until needed.
Rump Steak
Prepare a direct fire for hot grilling at 500 degrees F (160 degrees C). When at temperature, add the white oak for a delicate smoke flavor.
Trim the rump steak if needed. Lightly salt and pepper on each side.
Place the rump steak on the preheated grill and cook, turning regularly, until cooked to your preferred doneness.
Remove the rump steak from the grill and place it in the marinade to rest for 10 minutes. If the marinade does not fully cover the steak then flip halfway through this time.
Remove the steak from the marinade and slice to serve.