I just bought a 97 Maxima GXE and it is quite smooth and only has 35k miles on it. I already messed up by putting 87 octane gas in it (I didnt know that Maximas run bad on 87 octane gas). Is there anything else I should do to ensure maximum preformace/reliability? Fuel injector cleaner? Change spark plugs (for one reason or another there aren't standard platinum plugs in there)? Is there anything that I should pay special attention to (that I wouldn't on any other car other than a Maxima)? Just some general tips on how you guys maintain your Maximas would be good. Thanks

-eon