Oil Pressure Problems

[Guest RedLineGTR]

I am having oil pressure problems with my skyline r33 with my usual oil the pressure was perfect 1/kg at idle at optimal engine temp which is normal for a skyline. But after my last oil change I decided to change to a more expensive and a wider W rating oil, after the change my oil pressure has jumped to 2/kg at idle…WTF…First thought no way is this right. Drain the new “Better Oil” out replace filter and refill with the usual oil that I use without problems, still the same shit, might be a bit lower but no significant difference. What should I do, the only option I think would work since I have no other idea is a engine oil flush, since my car has done only “66,000km” I think it’s genuine I don’t think it would be a problem.

Thanks Rob

[Guest Peewee]

Hey rob it might actually be your oil pressure sender on the engine nissan engines have real dramas with them reading wrong or do you have an aftermarket gauge??

[Guest RedLineGTR]

yah i;ve read about that, but it;s just abit weird that from changing oils there is such a difference. Will try this week flushing the oil. IF nothing changes i'll try an aftermarket gauge if not i'll just leave it.

[KamikazeR33]

something to do with the thickness of the oil maybe?

i remember reading someone had thinker oil and solved a compression prob (or soemthin like that)

[Dr_Drift]

The thicker oil has trouble getting through the 'tight spots' in a motor and therefore shows a higher pressure. What are the ratings of before and after oils...

[Guest RedLineGTR]

Shell Helix Ultra 5-40W Was getting 1kg/cm at idle

after change to Castrol R 10-60W 3kg/cm 2.5kg/cm

[Al]

Is this on your factory gauge?

As on idle mine is showing more that 1/kg, has been since i've had it, is this normal or should i be worried?

What should it read on idle (factory gauge) and at 100km/h cruising?