I just purchased a gts r33. I do not know wheather i have problem with the oil pressure..

When i start up the engine , it shoot up all the way to 8....when i was on stationary, it stay between 4 to 6. when i rev,it increased up slightly below eigght. When i was driving hard, it can shott slightly further than 8...

Please anyone,,,,I need help..

High pressure is always better than low pressure.

Don't stress too much as the Nissan Oil pressure senders are notorious for being dodgy. Do the simple stuff, check your oil level. If that is ok, then you should be sweet. If you are really worried about it, get an aftermarket oil pressure gauge or take it to a mechanic.