Hi guys I thought I should add a story that I have
Recently my car started losing oil pressure, It was fine on cold start but as you drove around the pressure dropped to almost nothing and I was using a heap of oil as well, I was thinking the worst, till I read TO4GTRs thread about keeping that RB alive.
I had Motul 10w40 turbo light in the car and as the temperature built the oil simply couldnt cope and broke down becoming too thin for the pump to push properly
I changed to penrite 5w60 and problem solved so thnaks to dave for pointing me in the right direction, the penrite is about $20 cheaper too!