Time to change the oil
2 Answers
Use the factory recommended weight. Any name brand is OK in my experience. Keeping the oil clean is the biggest factor in engine life. I would change it often if you plan on keeping it. 5,000 miles with synthetic is good.
2014 5.3 takes 8-8.5 quarts.use dexos compatible synthetic only 0-w20.when in doubt read owners manual.