Hey guys I have a Sierra 4.8 only has 13000 miles on it obviously not afm, any how Its not using up any oil, but I was reading through everything and I noticed a lot of you are noticing oil consumption after like 5000 miles or about .5 of a quart around 3000 miles which should still put you in between the cross hatch (still safe) why wouldnt you guys just change your oil every 3000 miles and forget about the Olm.