I have been looking at this site for some time and really enjoy it. I have recently (within the 6 months) gotten my wife away from her 1999.5 pathfinder 4x4. I had to buy her a new Jetta but I really wanted the pathfinder. Anyways, My question is which spark plug is best? I know I need to use the NGK brand but Autozone and Advanced both sell several different ones and they all range in price. Any help would be appreciated.