2006 Sierra 5.3L 4300mi 5W30 0W40 Mix

[Brian Barnhart]

I believe the sodium is from the previous GTX oil change.

 

[aquariuscsm]

What brand of oils were these? Did you add MOS2?

 

[Brian Barnhart]

3 qt. 5W30 Shell, 1 qt. 5W30 Defy, and 2 qt. 0W40 M1. Normally I use only 5W30, but I wanted to see if a little 40 might reduce the engine noise (didn't seem to). No additives that I can recall.

 

[aquariuscsm]

Oh ok that must be where the moly came from,the Quaker State Defy.

 

[53' Stude]

Some of the moly came from the M1 0w40; please don't forget that

 

[Brian Barnhart]

I believe the Formula Shell has moly as well.

 

[53' Stude]

I realize that also

 

[Merkava_4]

Try straight 0W-40 next time.