Hi all. I just got my G35 yesterday! 2008 journey+sport+premium, pearl white paint/stone leather. 5AT. I plan to do all DIY oil changes between the every 30k major service.

I would like to know what motor oil to use and how often to change?

Thanks all. Its seems most people don't use oem infiniti oil filter, is infiniti ioil filter bad?

Do I have to jack the car up and remove that filter/oil plug cover off?(I read it has like 16 screws!)

 

Castrol Syntec 10-30 every 4500 miles

 

Just follow the mfg's recommendations:

5W-30 every 3750 miles or 7500 miles.

I would recommend synthetic if you follow the 7500 mile schedule and regular or synthetic blend should be fine every 3750 miles if your driving style falls under the shorter interval recommendation.

 

5W-30 is the recommended viscosity.
Use any premium conventional oil like Castrol/Penzzoil etc and you'll be fine.

Personally. I only switch my cars to synthetic at around 10K miles - I use regular dino oil till that time.

 

I'm running Castrol GTX 5w-30. I have 4400 miles right now and I changed my oil at 2700 miles. I've always ran synthetic in my cars in the past, but I've also always changed oil at 2500-3000 mile intervals (ALWAYS). I even used AMSOIL for 2 years trying to convince myself to change it less frequently, but I just can't.

Thus, I think I'm going to stick with Castrol; all of the oil analysis has it performing real well. Unless you can tolerate going 5000-7500 miles on a oil/filter change than I'd just run Castrol. I'm running Purolator's best filter.

 

What you guys think about Mobil 1 Extended Performance synthetic oil? 15,000 intervals? My friends said they are switch to that and never went back.

 

I would change my oil more often than 15,000 miles. It's cheap insurance.

"extended performance" oils just have more detergents. You still have the other crap in the oil that builds up with time.

Mobil 1 is ok. For a 30 weight oil, it's on the thin side though. GERMAN Castrol 0w30 is the way to go. You just have to find it.

 

+1 Have used GTX on my past three VQs, and they've run perfectly the entire time. Oil changes every 3k miles.

 

I go with my usual Mobile 1 synthetic 10w 30, with synthetic filter. Do the change every 3k-4k

 

I go with the Mobile 1 Synthetic 5w-30 filter. I change it every 3750 miles although I don't need to at all. For filters, I use the Napa Gold Filters.

My service advisor asked me why I used synthetic oil and what was the difference between the two. I explained to her and also made a mental note to never take any advise my advisor gives me....ever.

 

Honestly changing your synthetic oil at 3750 is a waste of money. On my Vette I normally went 7500 and blackstone oil analysis shows that I probably has 3-5k more. Just my .02

 

Do an oil analysis (with TBN) at around, say, 5k (just sample it - don't change it)

Based on that report, you can see if the oil can stand up to 15K for *your* usage style.
That's the only way to know if an extended interval suits you.

 

Oh I agree. The thing is, the place I got it from gives me a lifetime powertrain warranty. The catch? I must get ALL of my scheduled maintenance done at that specific dealer...which isn't too bad since its all free for 75,000 miles.

In my last car, I went about 6000 miles before changing my oil. Never had a single problem.

 

+ 1

 

Here comes the fun debate. Mobile-1 synthetic isn't really synthetic anymore.

I think an oil analysis showed (and I could be wrong, but I recall reading it) that Castrol GTX outperformed Mobile-1 on a VQ. This was the regular Mobile-1 you see everywhere, not the more expensive extended performance mixes (which I think are true synthetics).