Home › Forums › Stay Dirty Lounge › General Discussion › Copper Sludge? 6G72 3.0L › Copper Sludge? 6G72 3.0L February 3, 2020 at 1:30 am #895978 Daniel BrunsonParticipant I suppose it’s possible either I got a bad bottle of restore or the additive has done it’s job and now the excess copper is now just recirculating.