Fairmont oil pressure gauge too high?

[AC]

The mrs took the AU off to her mums yesterday(Sydney-Mudgee), she rang me up because the needle on the oil pressure was showing up into the RED, not the whole time. But was quite regularly high up or into the red part. All the manual says, is be concerned if it goes too low or down completely.
I usually only remember seeing around 3/4's when i drive the AU.

Those who know the roads, Sydney to Mudgee will know that its quite diverse driving, lots of huge hills/mountains to high speed zones to drive in, so i can understand the needle moving up and down with the drive.
I just dont know if we should be concerned or not?

For those unfamiliar, here's a pic i stole off ebay :P
Top Left gauge.

[guzzis3]

My NF goes high all the time. Could be a stuck pressure relief valve, more likely a dodgy sensor.

I only worry when it goes low...

[autickfordfairmont]

Mine was doing it for about 12 months. If I gave it some very spirited driving the needle would shoot up to the red and even past it. Most of the time it would sit just below the red. Now it sits on 3/4 and seems perfect again. Could be a dodgy sensor, a bad earth on the sensor is a common cause to apparantly (I belive it earths through the block or something). As long as its pointing somewhat in the right direction I have never worried about it. If it goes low thats when you worry.

[5.0 ED]

There was a ford fix for it, to put a piece of 5mm wire from battery to alternator bracket top nut, but that stops the low oil pressure readings not the high.

Mine goes off the end of the gauge sometimes, just dont worry about it