I am 74, and have been working on cars since my dad taught me when I was 6. I just picked up a 07 LaCrosse CX with 38k, 3.8 Series III. Interior and engine are fantastic, previous owner wasn't very careful when putting it in the garage. Any suggestions for inexpensive engine mods would be appreciated. Wouldn't mind adding a couple MPG! I hope to have many conversations on this forum.