Combine beef, eggs, onion, basting oil, 2 1/2 tablespoons BBQ sauce, salt, and pepper in large bowl. Add panko crumbs. Combine beef mixture well and form into loaf shape. Center on baking sheet.
Bake 30 minutes; remove from oven and top with remaining 2 tablespoons BBQ sauce. Return to oven. Bake 25-30 minutes or until internal temp reaches 160. (Check by inserting thermometer halfway into thickest part of meat). Serve with warmed gravy.