Hi Mace Engineering I have a VT V6 Ecotec with Mace Performance chip in stock engine but couple weeks ago the engine died. So, I have put in VY Ecotec engine which only done 126K and put in 10W 60 Penrite Racing oil with Ryco filter and also added ceratec from Liquoy Moly, but I can hear timing chain rattle. So I have asked few Mechanic they said 10W 60 is too thick. Yesterday put in HPR5 5W-40 now rattle dropped 50%. But noise is still there. Now I am thinking do I need to replace VT performance chip with a VY Ecotec performance chip or need to replace the VT computer with VY computer ? OR Do I send the Chip to Mace to re-program it, Please help. Thanks in advance.