Hi, Guys, This is my first post here, and I have a ? for you. I didn't know there was so much to this oil thing 'till I found yhis site. Very interesting. I have a 2002 silverado (4800 vortec) that I have been running M1 5w-30 for the first 20k at 4-5k oci. After reading alot on this site it makes me wonder, What would be best for my truck ,the M1, or dino-Havoline, Chevron supreme or Pennz at3k oci. I'm planning on keeping yhis truck for a long time. So does the M1 really give me an advantage?
Thanks for any replies. Gh