Just wondering if after 95K on my 2000 Chevy Blazer (4.3 vortec V6) I can switch from synthetic (AMSOIL) back to regular oil? I just don't see spending the $$ on it since I will be getting rid of it soon and I only put about 40 miles per day on it now. I am hoping there will be no detrimental affect to my engine!! what do ya think??