I got my car with 88000mi on it now its got 92000, how much is a 90000mi service,does my timing belt need to be changed.
And what about valves, my car sounds louder than it was about a month ago, the nissan guy told me that the 95 max had hydrolic(not spelled right) valves and they couldnt be adjusted so what should I do. how much would what I need cost????? oh yea I also started using mobil 1 syn. 5w-20

 

95 maxs do not have timing belts. they got (timing) chains which will not require scheduled maint.

 

The 90k service is basically the same as the 30k service. Get these done:

Change oil and filter
Change air filter
Change fuel filter
Drain and refill transmission fluid
Drain and refill radiator coolant
Rotate tires
Check the car over

That's about it. The 4th gen Maximas do not have a timing belt. They have a timing chain which never needs to be replaced. Your mechanic is right. The valves should be inspected periodically and adjusted if needed.

If you goto the dealer, they will charge you $300 for the 30k service. If you goto an independent shop (like smart people do), they will charge around $200 or even less.