2015 Type R. Was under the car today and noticed that there is oil around the drain plug and case on my rear differential. Is this a leak since it seems to be spread out? Noticed a few drops on the cross beam as well.

 

I have a measly V6 so I don't know what the diff drain plug on a V8 with the E-diff looks like, but your plug looks like it may be a little loose or at least not fully tightened and if so that is probably the cause of the leak.
Easy enough to check and rectify, just don't go apeshit on it as most drain plugs are a tapered fit and are not meant to be cranked RFT otherwise you risk cracking the diff housing.

 

Yeah.. looks “normal” or not unusual.

but you can do a few things.
1) first loosen a half turn then tighten the drain plug
2) check the oil level via the second plug, higher up on left side cover
3) check for any drips of oil on the ground where the car normally parks

note: this may be a sign that your front axle pinion shaft seal is leaking a bit… and the oil flows down to the lowest point before dripping

 

Clean the diff very well, go drive for a few days/weeks and check again to see where the leak is coming from. Then deal with the cause.

 

Here's what my differential pinion seal leak looked like:

https://www.jaguarforums.com/forum/f...4/#post2335594

 

Welcome to the leaky rear dif club 😎

 

There is the differential vent that could be plugged. It is hard to see on top of the diff & body, but it SHOULD have a yellow cap.

Look at ~9:35