Your car is not German lmfao it's Japanese your German mechanic and you should be Ashamed...

 

Well, I've been using Castrol syntec 0w30. Went to buy some today and not one shop in my town has it anymore.. Been thinking about switching to Mobil 1 5w30 full synthetic. Maybe even Castrol 0w40.?? Any thoughts, anyone....?

 

I put whatever oil is on sale in my G, as most oils come from the same overhead manufacturer and the additives are standardized, rest is marketing.

 

yeAh I get ya. But wouldn't staying with one viscosity be better.? I know my question is a bit redundant, I just worry too much. Lol

 

No. Oil viscosity should be chosen by ambient temp. Also, mineral based oil or syn blend is best for our cars. Lots of folks use synthetic, but owners manual suggests mineral based (due to valve clearance) for a reason. It's amazing how many people have valve train noise on this forum and never question their oil choice. The Dino oil isn't recommended for no reason, y'all.

 

Scraggle has a point; mineral (conventional) oil is recommended by Infiniti. I don't see any harm in using a synthetic as long as it meets the same specification as a conventional of equivalent weight, which any API SN oil on the shelf will. Also note that the owners manual does not recommend using oil additives, which I would argue includes high mileage blends. Again just a recommendation.


I would use whatever quality 5W-30 or 10W-30 that you prefer along with a quality oil filter. Just ensure that you change the oil and filter at the recommended drain intervals, and check your oil level regularly. If you use 5W-30 and consume oil, try using 10W-30 (if the ambient temp in your location is above 0) or installing a catch can.


If you want to find some data on oil performance in the VQ35 to help make a decision, you can look on bobistheoilguy or the "VQ Oil Analysis and Info" thread on my350z.

 

This is If you have OC issues changing the weight of your oil/adding a catch can won't change a thing...wishful thinking!
Gary

 

I am using 15w50

 

My car uses 10 30 slower than it uses 5 30.

 

So what oil would you recommend. I have a 04 G35 with about 137k miles. And live in very hot temperatures. Do you recommend royal purple or just any synthetic blend. It's my first G and really want to take care of it. I would really appreciate the response.

 

My previous 06 G35 had 171796 miles and I only used 5W-30 whatever was on sale

I no longer change my own oil and let the dealer do it.
For the $48 I can watch TV, eat their snacks, coffee, bagels, cookies,etc, and they wash and vacuum my car. They also gave me the mm thickness measurements left on my brake pads all while sitting in an air conditioned waiting room.

Read your owners manual recommendations and knock yourself out.

Telcoman

 

First oil change just use whatever you want, most important is to stick with the proper viscosity, flush interval, and monitor oil levels every week. If you have a consumption problem then switch back to the Nissan conventional oil.

Mine will drink synthetic like it's going out of style but uses barely any conventional across 3k miles.

 

I've witnessed the opposite with Mobil 1 full synthetic.

 

Honestly, if its THAT hot you should be using 10w40 minimum, but I live in SoCal and I used 20w50 conventional for the first ~3yrs of ownership. When I switched to a syn blend I switched the weight to 10w30 just cuz syn has better cooling properties anyway, so the extra "cushion" of the 20w50 became less relevant. As far as brand, I like castrol magnatec. Its honestly the only oil where I've felt a phsical difference in smoothness.

 

Penzoil Platinum 5W-30 works great for me here in north Texas. Using the same but 5W-20 in my '04 V6 Accord that has 234k miles on it and still runs great.