Background 2015 Buick Regal 2.0 Turbo, CAI and Trifecta Tune, 53k miles. Oil is black and smells like gas. Changed oil early last two changes and still like this. I just changed the oil, ran around the block, checked oil and it's already dark and smells? Any thoughts? It's getting about 28MPG, runs great, never any warning lights?
Matt
Matt
