Chevrolet Tahoe Engine Burning Oil

In 2009, We Discover The Heads Had A Bad Casting And Porous Cracks Not Visible To The Eye, But Failed A Pressure Test. So, They Were...

I Have Just Taken A Long Road Trip And Notice That When I Drive 65 Mph Or Slower, All Is Well With The Oil Level. However, When I Set The...

Burning Oil . What Do I Do ?

I Only Want To Use Ac/delco Oil But Not Sure To Get The Sae 80w-90 Gl-5 (not Synthetic) Or The Sae 75w-90 Gl-5 Which Is Synthetic. Also...