Yeh thats right mate they are aimed at RB26's and I was talking about them, i'm not sure about RB25's I dont think they would need to be that thick especially if only street driven and lightly modded, I think 10w40 would be about right.
Tell me about it, who the hell knows whats in them every second oil has synthetic written on it. Its such complex shit that its not that easy to work out whats good and whats not. I have read that there are hydroprocessed syhthetic oils (ultra refined mineral oil, group 3) that work as good or better than oils that are pure synthetic (PAO, group 4). Apparently mixes of several bases produces the best product, so you tell me which is the best oil out there and whats in it. People here talk about only using pure synthetic oil and that Motul 300v is 100% ester based etc, but they use Ester, PAO and Group 3 base stock to give the best product which is still a 100% synthetic oil. Motul says that they use double ester technology not that its mainly based on ester, apparently it contains between 20% to 30% ester. There are plenty of oils out there that are labeled 100% synthetic but all are blends of Ester/PAO/AN/GP3 or something similar which are still 100% synthetic and very good oils. Motul 300v in my opinion is still pretty much on top of list with Redline of the best oil's out there, because of their reputation and so many satisfied users out there, but it just shows that its very complicated with how they are made and advertised its not as simple as some might think.