I know the most common answer would be get take it out and drive it, but putting that answer aside... What is the best way to counter fuel in the oil? Right now I'm using Mobil 1, it's been in for 4 months (1,100 miles) most of which where short commutes (1-5 miles). I did put 2 180 mile highway trips on it, but I can still smell fuel in the oil. It's also very dark, but then again this is the first time I've used synthetics. My conern with Mobil 1 and the fuel is that Mobil 1 is on the thin side to begin with so a little fuel could put it well into the 20W range, right? Would I be better off using some version of High Mileage oil to help it stay in the correct weight? I don't have a comsumption problem, but it does have almost 84,000 miles on it. Just curious what you guys would say.