Try a K&N Model HP1006. Bigger than Infiniti filter. Same Pressure relief valve value..

Lou

 

You acted concerned about the size of the filter, as was I. On such a high performance engine, I don't want to skimp on this important item. I am using the K&N HP1006. Why should this be a warranty issue? As long as you change the oil and filter your OK. You don't need to use a Nissan one.

Lou

 

You don't need to pull the diffuser off. If you jack up the right front side of the car a little bit higher than the left the oil filter will drain right thru the cut out. (on a sedan, don't know about coupe). the oil plug drains perfectly. 20 minutes tops, including wiping down drips and pulling the engine cover off to avoid getting oil on it.

Better Life thru Chemistry

 

Great! But how do you get to the oil filter???

2003 Twilight Blue Sedan 5AT, sunroof, leather,
splashguards, GG red 7 wire Hypergrounding kit, 350Z intake duct, K&N filter.

 

An aftermarket filter is not a warranty issue. The only way a car maker can require you to use their OEM filter is if they provide it to you free of charge. This has to do with any wear item (brake pads, hoses, etc.). It's part of the Magnusson-Moss Warranty Act.

The goal, of course, is to prevent the car maker from requiring replacement parts that they can charge a premium for.

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter

 

umm, you reach up there to it. It ain't too far in there.

Better Life thru Chemistry

 

Can't see it anywhere with the diffuser on. There appears to
be a small trap door in the cover. Is that where it is?
I find it easier to just take the G to the dealer with my
own synthetic oil. They charge me $19 to change the oil when
I bring my own, then I don't have the hassle of disposing of
the old oil. But, I really prefer to change my own oil.
During the 3+ years I have had our 2000 Maxima, I think
I have done all it's oil changes except maybe 2. Don't like
strangers working my cars.

2003 Twilight Blue Sedan 5AT, sunroof, leather,
splashguards, GG red 8 wire Hypergrounding kit, 350Z intake duct, K&N filter.

 

I don't think there are diffusers that need to be taken off, in the front of the car. There is a cover, but I don't think it's a diffuser.

G35 Coupe. Diamond Graphite, Graphite, Premium and wheel and Tire package. Zaino Baby.

 

It is a diffuser. Underbody airflow is one of the things Infiniti paid attention to with this car, giving us a nice, low coefficient of drag.

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter

 

So, we already have diffusers in the front? And the deffusers that come with the aero package are for the rear?

G35 Coupe. Diamond Graphite, Graphite, Premium and wheel and Tire package. Zaino Baby.

 

That is correct. I did not get the Aero kit so don't
have the rear diffusers, sniff sniff....
Checked into buying them from the dealer. For $700+
I will just have to live without them.

2003 Twilight Blue Sedan 5AT, sunroof, Graphite Leather,
splashguards, GG red 8 wire Hypergrounding kit, 350Z intake duct, K&N filter.

 

I didn't think the diffusers were that expensive. Are you sure that doesn't include the spoiler? I think GSM? looked at just the diffusers for less than $100 if I remember correctly.

<font color=green>GG</font color=green>

 

I specifically asked my smartallecky parts guy about
the rear diffusers. He quoted me $700+. Also quoted me
$600+ for the spoiler. You know that whenever you buy
parts separately, they ask for an arm and a leg.
In this case, it is worth it to get the Aero kit.

2003 Twilight Blue Sedan 5AT, sunroof, Graphite Leather,
splashguards, GG red 8 wire Hypergrounding kit, 350Z intake duct, K&N filter.