I just had an oil change done at an indy shop this morning. They used 5w30. Afterwards, I decided to drop by at the dealer to confirm the shop put in the right engine oil. I talked to the parts departments and 2 technicians, and all of them told me that the G35 coupe uses 10w30. I went back to the indy shop, and they swore to me that the dealer is wrong. I called a different dealer, and they told me it's 10w30 also. So which is it? I'm very confused now. I no longer have the owner's service manual with my car.

 

it doesnt matter, youll be alright.

i use 10w30 in my car, but youll be fine with 5w30 for now. its all the temperature and how ou drive.

 

If you had one your manual states 5W/30 but there's nothing wrong with
using 10W/30, that's what I use. It is worth it for your engine to use a
full synthetic oil like Mobil 1 or Royal Purple 10W/30!

 

EDIT: I agree with express705... use a good full synthetic oil though like Amsoil...

 

Mine has 5W-30 in.

 

German Castrol which only comes in 0W30.

 

I use synthetic Quaker State 5w30 for the engine and synthetic manual tranny and diff.

 

Wow thanks for the quick replies! Guess I'm alright for now. I'll switch it to synthetic the next time I need an oil change.

 

I just stick to whatever is on the engine, and go mobil 1.... it might not be the "best" but it is a big company to back their product if something goes wrong... and it kicks the a$$ out of any convential oil...

 

i use 5w30 Penzoil Platinum fully synthetic.

 

I use Royal Purple 5W-30

 

10W-30 Full Synthetic Castrol Syntec for now that summer is coming around, and 5W-30 in the winter...

 

Going 10w30 is just a way to hide the fact the our engine burns oil. thats all.

 

^What?
What does oil weight have to do with burnoff? Ie comparing a 0w-30 a 5w-30 and a 10w-30...
All of them are 30 weight when warm and thus equivalent oils when considering burnoff, as far as I know, a 0w and a 10w30 wont have different properties in the burning engine oil sense.

 

i saw some tests on my350z.com that amsoil wasnt good in our engines, and my mechanic who specializes in german cars told me the same, and that it burned faster too. I tried it out before too and it burned pretty quickly. i hear the best for out cars is the castrol 0w-30 german formula