I've got an 03 Silverado 5.3 and I plan to try Amsoil out. I have some S2000 0-w30 and two filters that I ordered through a dealer. After I looked online the amsoil site says for the 03 5.3 I should have the SDF 32 filter. What I was given was the SDF 64 filters which appear to be for an 02 and prior 5.3 engines. Should I exchange them or will I be ok running them? I know it will fit, but what other differences could there be?