I bought my 08 f350 manual with 68000 miles from a ford dealer back in early June. I found a sticking front brake caliper when test driving it and they agreed to fix it before I bought it. So I get it home two weeks later and notice the fan it staying engaged when it shouldn’t and also seeing oil drips in drive way. I inspect it and see the hydro booster is leaking fluid and there is oil drops on bell housing. I take it to the dealer they replace fan clutch, hydro booster and lower oil pan gasket. I get the truck back six weeks later and the truck is still leaving oil spots in drive way along with oil spots all over underside on drive side all the way back to the axle. I call them talk to them and they look at it and tell me they can’t see a leak and that it was probably residual oil from former leak. I stop by dealer a week later and look at the truck with then on the life telling them I think it way be coming from the dip stick o ring. ( oil has dye in it and iv looked at it with my black light). They clean underside and flame they drove it 60 miles and it’s not leaking. So I pick it up a week later(today). I drive it 50 miles home look it over power wash it better because they did a piss poor job and drive it back to the dealer ship to get my car and come home(100 miles round trip) . I look under it after all this and there is defiantly oil drops on bell housing and oil spots all over under side on the driver side back to the axle again. I look at it with black light again and you can see very small amounts of dye where the bed plate meats the block but no trail all the way down to ledge where the dip stick goes in. But that ledge is covered in dye so with that and the oil spots all down the driver side it seems like it would be the dip stick o ring. At this point I’m going to replace that o ring because a 5$ oring isn’t worth making the trip to dealer with two vehicles to drop it off then the same to pick it up. To many miles.... but I fear the upper oil pan gasket or bed plate may be the prob and that’s something I can’t fix and very expensive to have someone to fix. It seems with all the oil spots under it the upper oil pan gasket and the bed plate wouldn’t be the cause but idk. The o ring is easy enough and cheap enough that it’s worth a try. It’s obviously leaking and I have no Faith in this dealer ship at this point. By the way all these repaired have been at there cost and iv put less than 750 miles on it. My question is does it should more likely to be a dip stick oring and what can I do with this dealer ship if the oring doesn’t fix it and they refuse to fix the upper oil pan or bed plate or just refuse to Knowledge that it’s even leaking. ?