I think 10~50w too thin for skyline engine! Just wild guess!
Anyway, Kelvin, don't simple listen to some mech at the shop, i just mistaken for once i left my car at a neighborhood service center, i went yum cha.
I told tat guy to rotate tires, engine oil change, oil filter change and when i sign the bill, not tat i don't wanna pay for the 5L Mobil 1 FulSyn oil, but i damn angry and ask why you put 5L?!?!
Tat so call chief told me loud loud, a V6 engine uses 5L!!
I ask him what do you mean all V6!? He start to soften and i continue to ask, you add the 5th Liter because you see it's not enough? or just pour?!
Then only he ask the mech that did my car...but before tat guy can answer, he scolded him "next time must ask client if can put or not"!!
My god, he still don't get the point! i just tell him it's ok, no point talking as it's done and i'll pay the 5L!
I never visited this shop anymore! No even for simple task! Believe me, there are bunch of No Tech, No Logic, No experience, No Brain out there trying to just simply make a living without having the heart of understanding what they are doing!