look here and here, this noob red dragon has asked this question before:
Genuine Oils:
http://www.perth-wrx.com/vb/general-...ngine-oil.html
5w30 or 10w40:
http://www.perth-wrx.com/vb/general-...w30-10w40.html
I used to use castrol edge 5w30, it was a great oil. then motul turbo light, but apparently its velocity is 8w when it says 10w or something. it was good but is semi sinthetic and the price is more dear. Then i went to mobil 1 10w40 semi synthetic because of the 10w protection on start up. i know on my discussion people have said 5w is fine ect, but also it was a price factor and what i use the car for, a daily driver not a daily racer. i am hoping that maybe mao from evo r could bring in a 10w40 fully or semi synthetic from cusco as i would like to try it.
if the funds allowed it, royal purpal or motul 10w40 or something from redline would be in my car
i was considering using castrol edge 10w60 but not sure if its too thick? it states on the box that it is designed for the older turbo cars... anyone used this oil and their experiences please?