Just got a 93 NX2000

[Jimmy Pop]

hi guys, i just got a nx2000! its so nice, only got 87000 on it, its white,
and is imaculate inside. the people i bought it from had no idea of what
this thing was, hehe! im 15, its gonna be my first car, its everything i
want. anyway, ive read the owners manual, and i still am not for sure,
should i use 91 octane in it for the best overall performance? it said that
the research octane was 91, so im guessing they got 140hp with 91 octane.
thanks alot and if u got any suggestions on other things to do and watch out
for please tell me, i love this car so much! it looks kinda like the z's
little brother, hehe