I've jacked her up and pulled the splash guard, also pulled the air filter, I don't see anywhere on the engine that this oil is coming from, everything above the wet subframe is dry.
So the second picture is where the leak is exiting the car, at the lower control arm bush drivers side, and the first picture is the accumulation of oil after about 1 minute of runtime, its a considerable leak.

Does anyone have an idea what would be leaking on the engine to come out at this spot on the subframe?

It's an 2009 XF-P with 145,000 miles

 

I can see the top and bottom of the balancer and most of that side of the head and block, all around the oil pan is dry, but that wouldn't make it to the subframe anyway. I have never spent so much time looking for a leak and not been able to find it, this has me stumped.

 

It would help a lot if you told us what year, model and engine.

 

Awful thin looking oil ! have you checked brake fluid , just a thought.

 

Yes it would be! 2009 XF, 4.2 with 145,000 miles.
With the exception of a few small areas, I'm shocked at just how clean the engine is. You would think that would make it easier to find a leak.....

 

Try the oil and transmission cooler lines. They run to the radiator on that side of the car.

 

Same drip.
Same wet area on my xf 4.2. Transmission lines are leaking.

 

My leak is absolutely motor oil. I didn’t know oil left the engine, I thought the cooler was built into the filter housing and the cooler used coolant cool the oil.

Is oil pumped to the radiator like the tranny?

Or maybe I’m completely wrong and my tranny fluid smells and looks like motor oil, that fluid is the original fluid, could it be that it doesn’t smell like tranny fluid any longer?

 

Zf tranny fluid looks like motor oil. Its a honey brown color.

Take a second look next time you're under the car. You will have to peek in, past the fan shroud, to see the trans cooler lines going into the radiator. Mine was leaking where the steel line connect to the rubber hoses.

 

SV-Does is not smell like tranny fluid either?

The location you're talking about is spot on, it's the only place above the leak that something is wet, but I've been so certain that it is motor oil leaking that I didn't investigate the trans lines further.

 

Doesn't even smell like transmission fluid. I even thought it was oil. But while doing a transmission fluid change, i discovered the fluid looks like motor oil and it doesn't smell like conventional trans fluid.

You have get a light and shine it in the area directly in front of the radiator fan.

 

If you're saying that it doesn't look or smell like conventional tranny fluid, then I must have the same problem. I'll get in there tomorrow and let you know what I find.
Thanks for all the help!

 

I was just under my XF again, I cannot pinpoint the leak without removing more stuff. At the very least I will need to remove that cowl under the bumper, then maybe I can see where its coming from with certainty.
I do think you're right sv8, it's one of the hoses coming from one of the coolers up front, which one isn't easy to spot, motor oil, tranny fluid, I'm simply not sure anymore..

 

Here is the only drip I can find, but it's not dripping fast enough to be the source. Maybe a hose above, maybe further up this hose? I don't know yet.

This is tranny line correct? Does motor oil go to the radiator to be cooled?

 

It is the tranny line. for anyone else needing to know for sure, here is the radiator.

 

Does this model have a variable timing set up (VVT)? On my 2000 XK8 they are located on the front end of each valve cover of my 4.0 V8... and each has a seal that can leak. Replacing mine now.

 

Awww... Never mind. Glad you found it.

 

Just want to give an update, it was definitely the transmission lines leaking. I simply cut off the compression fittings, replaced the rubber and added 2 hose clamps at each joint.
You can find a similar post here: https://www.jaguarforums.com/forum/x...tenance-86994/