Oil and water mixing?

Hi
Is ignorance bliss.
I've travelled 600 miles from Ireland to France. Checked the oil and coolant. There oil floating on top of the coolant and the new oil looks slightly off colour.
What are my best options ? A can of stop leak of some sort and drive on.
Internet connection is patchy so I can't get to the replys all the time. Driving back up France on Tuesday.

Thanks

What engine?

I'm not familiar with the mechanics of a discovery, but had the same problem on my defender which has an oil cooler fitted (Tdci). The internal seals failed, allowing the oil to pass into the coolant. Due to the oil being at higher pressure than the coolant, water did not flow into the oil. Like yours, the oil showed itself in the coolant expansion tank. The fix included a new oil cooler, new rad, new hoses throughout, new sensors in the hose runs. Luckily for me it was a warranty fix so cost me nowt.

+1 for the oil cooler, unfortunately it's expensive so is the repair kit

15p. ? Later one

Once you have established the cause and fixed it, you will need to get the oil out of the cooling system. The oil will have internally coated all the hoses, radiator, heater matrix, temperature sensors. Before draining the coolant in the normal way siphon the oil from the coolant header tank, then remove any remaining oil film using rolled up paper towels. If you do not do this first the oil in the header tank will coat all the internal surfaces it passes through the system and will eventually work it's way back to the header tank. There will also be oil deposits in the system which have not yet worked their way to the header tank, but they will eventually. After the coolant change, check the header tank every couple of days and get the oil out with the paper towels again, eventually all the oil in the system can be got out this way. Since my episode, checking the coolant header tank for oil is part of my regular checks. Happily it has not reoccured.

I've had the oil cooler burst before. ( over 12 months ago) But pipes weren't replaced apart from top pipe that burst at same time. Maybe it oil residue from running in warmer temps. Never run in 25 C+ temps Since oil slightly discoloured.

After anybody run, oil and fluids look normal, after the long hot and hard journey expansion tank has oil on in it so I'm guessing it's amthrowbac from the burst oil cooler.

I have to laughter at the Toyota motsport link below this thread. Is someone try to tell us something?