60k tune-up is around the corner..already ordered spark plugs...do i need to replace any belts or hoses? i did all the things except cooling system flush. and is bilstein high pressure engine flush beneficial? local nissan dealer wants $119.99 to perform it. thanks

 

Change your belts and fuel filter. Check out this thread:

.https://maxima.org/forums/showthread.phtml?threadid=26628