Hello, ive recently purchased a 98 r34, and want to give her a good service to get her off to a good start. ive read all the posts ye ave on oil but ave found alot of different views and no definite answers. Even the poll there is a huge range of oils used, but can anyone tell me wot kinda oil they are ment to ave according to nissan? From the info ive got im heading for a 15w 50, vavoline id say, but i presume it has to be fully sythetic, or has anyone had experience with valvoline in skylines? Coz ive used it before in an mr2 turbo and found it to be a v good oil. any advice would be helpful.