Got a 2008 f250 lariat, beautiful truck 107,000 miles crew cab 2 wheel drive picked it up Friday. Took it to my mechanic friend to be check out before a weekend trip of about 150 miles one way. Found the coolant level low, and the oil level high, he suggested an oil change before I went, so I went and had that done. The next day I went to fuel up and noticed a leak when I walked back from paying, oil looking spot. Drove it home and found it leaking from what looks like the radiator, rolled up a piece of paper towel and stuck it in the radiator overflow bottle and some black gunk came back on the paper towel. I have an extended warranty, but is this a sign to move on to another truck, or if its fixed under warranty will it be reliable or a constant pain in the ***. I love the truck but don't want to live at the mechanics shop. Thanks for your opinion