1. Heat oil in a medium heavy-bottomed saucepot over medium-high heat. Add beef, onions and garlic; cook until browned, breaking up meat with a wooden spoon, about 10 minutes. Stir in diced tomatoes, tomato sauce, chili powder and cumin. Bring tomato mixture to a boil, reduce heat to low and simmer, covered, until sauce thickens, stirring occasionally, about 1 hour.
2. Stir beans into meat mixture. Cook until heated through, about 10 minutes more. Stir in Adobo and sugar. Divide chili evenly among serving bowls.