The g35 coupe holds 5 quarts if oil. I would recomend using 5w-30 mobile 1 extended performance oil.
Fill tires to 30 pds.
300hp
About 3,500 LBS
280hp stock
5w 30
5 quarts
I had a similar problem on my 2006 G35. All I had to do was check the tire pressure on all wheels and fill them back up to spec; the light went off by itself.
600-800
280 stock
take it to the dealer
There is none. Just fill up your tires to the proper inflation and the light will go off.