http://www.mobil.com/USA-English/Lub...bil1_0W-30.asp

just letting you guys know such a thing exist =).. was doing a oil change and a couple buddies of mine were talking about it (using 5w-30)..

anyways the 0w-30 sounds pretty good.. especially for us cali guys.. hmm now i need is the mobil1 oil filter..

 

would this work for out car?

 

yes this works prefectly fine for our cars.. should be the new good stuff for us guys in hot weather

 

castrol syntec 0w-30 is still the only over the counter 30 weight that is porsche approved. if this oil will hold up in a porsche, it will do fine in your g35...

 

I always tell myself i'm gonna look it up...but yeh...i'm a noob. Can someone explain the viscosities of the oil to me? IE: What's the advantage of using 0w-30 over 0w-40? How about 0w-30 vs. 5w-30 vs. 10w-30?

Also...have you guys seen the type of oil M3's use? 10W-60 I heard BMW custom ordered this type for oil from castrol just for the m3.

 

I used 0w-30 once in a previous vehicle and let me tell you the oil is so light weight that my valve cover gasket was leaking like a sieve.

 

Using 0W-30 in hot weather doesn't offer much benefit. SoCal guys don't have to endure the crappy 30 degree starts like us CO guys. -some jealousy...

 

I use MOBIL1 5W-30 because of that very reason, it could cause leaks due to being to light and sepping into valve cover ad other gaskets

I stayed away

 

I agree with Panman, I would NOT use the 0W-30 oil if I lived in a Hot Climate area.....that oil is to provide the 0W viscosity for Cold Weather start-ups. If you live in an area that gets hot, you will want the 5W weight to provide the viscosity needed to prevent wear & tear at start-up.......for those of us in the southern US, use the 5W-30 weight oil as spec'd.

 

To answer the question up above.

The difference between 0W-30 and 0W-40 is that the 0W-40 has a higher heat rating.....meaning it can handle higher temps.

In the south, I would definitely use 0W-40.

Just an FYI, the 0W part refers to the thickness of the oil. The thinner the oil, the better it is in my opinion. It's much better for performance and cold starts.

 

I'd be very careful in recommending that a car that is to be operated in a warm climate use the 0W oil.

Below is an excerpt from "How Stuff Works" that explains the numbering convention very well.

Multi-weight oils (such as 10W-30) are a new invention made possible by adding polymers to oil. The polymers allow the oil to have different weights at different temperatures. The first number indicates the viscosity of the oil at a cold temperature, while the second number indicates the viscosity at operating temperature.

As a Chemical Engineer, I will tell you that you do not want to have a 0W viscosity in your motor when starting in hot weather.....it WILL aid in reducing the life of your motor. Porsche uses a coating (Nikasil) in their motor's cylinders that allows for the use of the 0W. There are different expansivity coefficients that come into play between the close tolerances of the rings and the cylinder walls, where the coating works with the oil to keep compression high but not wear. Our Infiniti motors are different and have spec's for 5W for a reason......I wouldn't recommend starting our motors with 0W. However, you are entitled to think and do whatever you want.

 

???

Only if you intend to ruin you engine and void the warranty.

 

Using 0W-30 will NOT void your warranty. Sewell Infiniti confirmed this for me.
They said it's as good as any other oil out there.

 

How about 5w 20? Actually I'm still under 3k so I only added approx. 1/4 of a pt just to raise the level a bit.

 

I'm not entirely sure why people want to find a different oil that will supposely be better than what's factory recommended. Did Infiniti engineers perhaps think the g35 would only be in cool weather temps?

Also, if hot weather is the concern, 10w-30 would be a better bet if anything imo. Some supra people swear by 15w-50 in hot weather and moddied conditions which is probably more understandable seeing how those cars are putting out twice as much power as factory...on a stock or bolt on G35? Stick to what's recommended. Just my 2 cents.