Butter makes a much better hamburger, as Guy discovers at San Diego's Crest Coffee shop! View #DDD, Fridays at 9|8c + register for #discoveryplus to stream the whole library and so far more:. Sign Up For Food Network ▶ Guy Fieri takes a cross-country road trip to check out a few of America's timeless "oily spoon" dining establishments– diners, drive-ins and dives– that have been doing it right for years. Capture a new episode of #DDD every…