I have a Toyota GR Series V6 and it always gets a 0.3 for insolubles when I use a regular Toyota Oil Filter with M1 0W-30 AFE and I go on average 5,200+ miles between changes (I will go 7,500 - 10,000 easy after waranty is up). My Dad has a 2007 GM 3.6 and he got a 0.3 for insolubles with ~6,400 miles on Amsoil SSO 0W-30 with an Amsoil EAO Oil filter. We both drive pretty conservative, I wind it up now and then but always after it is good and warmed up by driving. Are Toyota filters that good or does it not matter that much? BTW - I always get between 10 - 13 ppm iron with the M1 0W-30 while I got 17 with M1 5W30 EP. Every 5K since new and went 5,000 on the factory fill.