Here's a good sauce that everyone has enjoyed for years around here and asked for again. Basically doubles a bottled version.
1- bottle of store bought. Cheap works fine. I usually use a larger bottle - 45 oz or so.
Add - 1 bottle of water to rinse out the bottle. 2 tbs chili powder, 1/2 tsp cumin, 3/4 tsp black pepper, 1/2 tsp garlic powder, 1 tsp liquid smoke, 1/3 cup ketchup, 1/3 cup white vinegar, 16 oz can of tomato sauce, 2 tsp. worchestershire, 1 tsp salt, 4 tsp lemon juice, 1 tbs vegetable oil. Mix all this in a pan and simmer being careful not to scorch.