Thanks for the reply, I will throw in some copper plugs and see how we go.JasonFriday13 wrote: Generally, no there isn't. The only rule of thumb is how many km's plugs have done since new. If you don't know that, I would suggest putting new plugs in. If you aren't doing plugs, it's kind of pointless doing leads, cap, and rotor. Generally it's plugs, then cap and rotor, then leads.
Regarding the timing of the engine, I read that advancing it slightly will make a noticeable gain. I think its a bit out of my depth to do this, is there anyone/garage that is Auckland based and done this before? I feel like my mechanic would think I'm crazy if I suggested this. Or should I just avoid making any changes all together?