RE: synthetic oil or regular
In the 5.7L, you absolutely need it for the MDS to work correctly.
__________________
For I know the plans I have for you," declares the LORD, "plans to prosper you and not to harm you, plans to give you hope and a future. Then you will call upon me and come and pray to me, and I will listen to you. You will seek me and find me when you seek me with all your heart.