Sprinkle the salmon with salt and pepper. Rub the garlic oil and dried oregano over the salmon to coat well. Once the grill is smoking hot, brush the grill rack with olive oil and immediately place the salmon at the 2-o’clock position on the grill. Cook for 4 minutes without lifting or turning the salmon. This will help give the salmon a good sear of nice grill marks and make it easier to move.
Starting at the corner of the salmon nearest to you, slide a long metal spatula under the salmon, turn it over, and cook until the salmon is mostly opaque, with a rosy center when pierced in the thickest part.