Someone needs advice - Oil pressure problem on Cape York

[Cuppa]

Hi folks, a couple are in strife with their TD42 up near the tip of Cape York. They are camped at Roonga Point which is an isolated spot about 30kms from the nearest (but limited) mechanical services at Bamaga. I think it's a '94 TD42

The wife wrote (on Facebook) :
Hi guys, my husband & I finished the old teletrack a few days ago. We got to the tip yesterday but on the way there we noticed the engine oil pressure was extremely high (it got to 6). We got to Bamaga & topped up with new oil (our car is a Nissan Patrol TD42) but it hasn’t dropped since we noticed it climbing from 4-6 between the old teletrack & Bamaga. We are currently sitting at Roonga Point wondering if we can drive or not without damaging something. If anyone can offer any advice or recommendations that would be great! Thank you ��

I suspect that either they have an oil pressure gauge which has been affected by water??? OR blocked filters. If it were me I would be looking at the dipstick to see if I could determine any oil contamination & removing the filters .... but I carry spare filters & oil, I'm guessing they may not or they'd probably be doing the same.

Would a blocked breather cause this? If so where would look for the breather?

Obviously they are hoping not to need an expensive recovery if they can do something themselves, but I have no idea how 'mechanical they are.

What would you do in their shoes? I think if it were me & I could confirm no water in oil & no blockage, I'd have a look at the oil pressure sender unit & ensure it was dry & give it a spray with WD40 ......... but what would be the best way to confirm there is no blockage?

I have given them a link to this forum, but I know from first hand experience the phone signal at Roonga point is pretty hit & miss.

Please share your thoughts & I'll try to pass them on.