1 try the 10 w oil FIRST
2 you cant adjust the idle [computer controlled nor should you
3 before you start taking it apart for oil Pump replace the sending unit...they often get clogged up setting off the light
4 I would keep driving it as is... 130K too soon for oil pump if you really did oil changes as you say...it could run to 200,000 as is without problemHow hard is it to replace a oil pump on a 97 cavalier 2.2?
well it kinda depends. i'm almost willing to be in that car you have to pull the motor so it won't be fun and if you don't have the skills to pull a motor and an engine stand you can't do it yourself.