Re: Lead Replacement
BP Ultimate or Optimax............you have to love the new Coles shopping docket discount, save $3 a tank on Optimax!
You may have to reduce your timing a little if you want to run regular unleaded - depending on your engine. Mine pings big time on regular, premium is fine.
Don't run unleaded continually as it will kill your valve seats as mentioned. You can throw in a bottle of valve seat protector with each tank if you don't get the hardened valve seats fitted. At about $8 per bottle its a pain in the ass, but I've just seen a new brand in a small ~50ml white bottle for about $3. There you go, Coles just paid for it!
393 Tremec TKO 9"