Larry

iTrader: (4)

My owners manual says to use only dexos 1 approved motor oil. Where do you find that other than the dealer? I went to my local Auto Zone and they had never even heard of it nor had it in their computer under 2011 Silverado 5.3 engine.

01WS6/tamu

iTrader: (36)

Use mobile 1 or amsoil full synthetic. The Dexos is a conventional/synthetic blend. If you really want to split hairs on it the mobile 1 is dexos criteria approved. They just don't want you running straight dino oil in it. When you get down to it almost all oils are good stuff and will go the distance.

I run 1 year 25 K amsoil and amsoil filters in all of my stuff for years

Robert91RS

iTrader: (2)

GM dexos Licensed Products

This is GM's Dexos approved oil list.

Larry

iTrader: (4)

Looks like quite a few make it but I just can find it. Perhaps like 01WS6/tamu says, just use Mobil 1 or Amsoil or probably any synthetic as long as it's 5w-30. My truck only has 150 miles on it so I have awhile to find the stuff if it's really necessary.

01WS6/tamu

iTrader: (36)

It's pretty much whatever flavor you like. I run 10/30 in mine for what it's worth. Pretty much anything you run in it won't hurt it just another way for gm to try and make stuff more difficult.

Larry

iTrader: (4)

I think you are probably right. Cars back in the 50s/60s used regular oil and ran well over 100K miles even back then. But they did require changing more often.

texasglock23

iTrader: (1)

I had a hard time coming up with anything, those running amsoil, how much is it locally? Anyone in the DFW?

01WS6/tamu

iTrader: (36)

I order mine by the case since we sell it at our shop. I think a case of the extended change is around 85 but you can buy it by the quart also. I think about the same price as mobil per quart if you can find someone who has it locally.

blackcash

That list doesn't mention Royal Purple, but it is dexos approved. At least they now advertise that on the bottles

Allgonoshow

iTrader: (1)

I won't say this is true in all cases, but from what I have seen, dexos is cost competitive anyway.

If your truck is still under warranty, you will want to document/have receipts for non-delaer oil changes that show an approved oil.