My brother was checking the oil in his 96 Z71 and there was no oil in it
He dosnt really remember the last time he changed it but he used a full synthetic. It didnt leak out it dosnt smoke. It was doing its job you couldnt tell it was that low 4.5 qrt low. It takes 6. I got to thinking about it 4000 miles ago I use full synthetic in my 2000 GMC Z71 so I checked it and it was 2 qrts low. So whats the deal were dose it go?? Dose it slip by the pistons during high rpms and blow out the exhust? Any Ideas??