My 99 Zx2 escort auto has 90k miles. I have changed the air filter about 10k miles ago to a wix paper, new OE motor craft spark plugs, new wires, new wix fuel filter changed coolant 1 yr ago, changed auto trans fluid pan & transaxle 1 year ago= 13K miles will change transaxle fluid ago in 2 weeks, New gates gater back belt about 6k miles ago.run water through AC condenser/rad fins weekly sense I live on a gravel road I also hose off my pulleys to keep the sand out.Change the oil ever 5k using moble 1 5w 30 and va Fl 2005 filter

Question anything I can do to make my car last longer?
What about the performance of this car. The k&n drop in filter does Nothing for my car. So I guess I need a chip and timinng gears. What else?
Dustin