Excessive oil presdure after oil change

[Blakefruid]

Morning all,
So I changed the oil and oil filter ready for our Ireland road trip and now the oil pressue gauge red lines at 3000 rpm, its normal at idle (1bar) and about 3bar up to 55mph/3000rpm then just goes all the way over.
Its a rebuild 1.6TD that was fitted on January so is clean.
Any ideas why and what to do?
Thanks ever so much,
Blakie

[cobblers]

What oil and filter did you use?

[Aidan]

what he asked, also gauges aren't always accurate, have you calibrated against with a wet test gauge ?

[Blakefruid]

Hi Aidan,
Yeah, I know gauges are a little wayward, bit this is unusual, the needle is right off thr gauge to the right over 3000 rpm, under that and itd higher than normal, but not far off. Electrical onnections are good
Not calibrated, just trending the the gauge.
Many thanks,
Blakie

[Blakefruid]

Morning,
As always I used 15W40 Fuchs mineral oil. The filter was a Mann W940/25 (stock I think) both from Brickwerks.
It did have a Mann W830/1 prior to the oil change, a short filter for an external oil cooler sanwich plate (not currently connected). Do you think the different filter would have such a dramatic effect on the pressure?
The oil was black but smooth.
Thanks for your help,
Blakie

[Blakefruid]

Sorted yay!!!
So I re-checked all the connections and they seemed fine, so thought I'd swap out the sender- once removed and on the bench I found a fracture in the stud that took pliers to bend open. Fitted a new sender, all good.
Thanks so much for your time and help,
Blakie