prelude styl said:plugs all depend on what you're going for. There's 3 choices(basically), There's performance, in which Silver is the best(expensive), but for basic applications, copper plugs are the best, but, in turn with the performance, you get lesser life span of the plug. Then you got your Iridium plugs, they give the least amount of performance due to the least amount of conductivity, but they last the longest. Then you got your platinums which are a nice medium.