5w30
under the vehicle, close to the oil pan.
Oil for 1997 infiniti needed
6
4.3 Quarts with a new filter
5w-30
5w-30... amsoil is a good product.. any quality synthetic. its your motors life blood change it on recommended service points. don't be cheep it will cost you!
A 1999 Q45 takes 6 quarts of oil (with a new filter).
Although the year and model was not stated in the question, I'll assume you have an Infiniti QX4 in the year range 1997-2000, since that model was equipped with a 3.3L engine. If that assumption is correct, the engine oil capacity is 3.6 quarts.
10w-30
5w 30
10w-30 or 10w-40 oil