My car today started leaking what looks like both oil and fuel, bad enough that I could see it visibly dripping under the car after shutting it off for about 5-7 minutes. Another symptom is that to start it, I have to "give it a little gas" while the engine is turning over or it won't start (may or may not be related). It's been that way for 2+ years, but just within the last 2 days, noticeably worse. Any guess what would cause that leaking issue, and, is it time to trade it in? 2005 (or 6?) Buick Rendezvous with about 140K miles.