Just picked up my 2008 G35x Sport.



I did a read through the FAQ's, a few searches etc. Still have a couple minor questions since the service manual is a bit vague. I'd like a bit of advice on a couple things:

Mods: any basic bolt ons worth while? Anything that can be done relatively easy for a good gain would be considered.

Maintenance - This has 30k miles on it, I replaced the air filters, I have a cabin filter on order, otherwise this thing has been maintained regularly.

At what point should the differential and trans fluids be replaced? The preferred schedule says right now, but the other two schedules (1 and 2) don't mention a replacement. The car has lived a pretty easy life of highway miles to date.

Thanks all.

 

mods: Intake, exhaust, and a re-flash the ECU 30 horses.

differential and trans fluids: Normal driving will raise fluid temperatures to 175 degrees F., which is the usual temperature range at which most fluids are designed to operate. If fluid temperatures can be held to 175 degrees F., ATF will last almost indefinitely --say up to 100,000 miles. But if the fluid temperature goes much higher, the life of the fluid begins to plummet. The problem is even normal driving can push fluid temperatures well beyond safe limits. And once that happens, the trouble begins.
At 195 degrees F., for instance, fluid life is reduced to 50,000 miles. At 220 degrees, which is commonly encountered in many transmissions, the fluid is only good for about 25,000 miles. At 240 degrees F., the fluid won't go much over 10,000 miles. Add another 20 degrees, and life expectancy drops to 5,000 miles. Go to 295 or 300 degrees F., and 1,000 to 1,500 miles is about all you'll get before the transmission burns up

 

Congrats on the new car..

My car also just hit 30k miles, any special maintenance required out of the ordinary?

lakeshore_slate
- Basically, you are saying that the fluids be changed every 25k miles?

 

it doesn't hurt to do a full flush on the systems. if you know you want to enjoy the car, it pays to spend some time to check the fluids since you don't know the previous owners

 

It really all depends where you live geographically, how hard you drive, and what kind of traffic etc. you are usually in. There are many factors that come into play, but just like he said ^ you dont know excattly what previous owners did so now would be good idea after just getting the new whip and around every 3 years do a flush 30-50k or so.