Amsoil
#11
Also when you do a 25k/1 year (whichever comes first) extended drain you change the filter at least twice. Many modern engines can do 25k/1 year OCI (non severe service) easily due to having roller tappets and being very easy on oil.
Last edited by lipadj46; 04-01-2010 at 06:44 PM.
#12
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