Cheers niZmO_Man, appreciate you taking the time to explain that to me.
I'm in Melbourne. The weather fluctuates like crazy here in Melbourne. The winters here are relatively cold but not to the extreme. In saying that, i have never had a problem doing a cold start. However, this winter has been unusually chilly. In summer, the mercury can hits levels of low to mid 40's but that's the extreme. It's usually quite pleasant here in summer in my opinion.
You are correct in presuming a daily driver. It will never see the track. However, it does have coilovers and sway bars and every now and then, i like to put my foot down and take some corners a little aggressively. Based on the number of kms I've done and my local climate, i'm leaning towards something in the 5W-30/40 range. Your probs right, i don't need to spend too much on the oil but i want nothing but the best for my R34 and want it running as smooth as possible. Have mate who has the same car as me, except his a GT-V. He swears by Mobil 1.
Just another quick question, how will i know if 5W-30 is too thin? I don't want any oil seeping into places where it shouldn't so is there any sort of indication?