Oil for 1997 infiniti needed
6
4.3 Quarts with a new filter
under the vehicle, close to the oil pan.
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!
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.
Yes, you can even mix synthetic with conventional oil.
10w-30
5w 30
10w-30 or 10w-40 oil
5w30 synthetic. 5 quarts.