2004 GMC Sierra 6.0 18k engine 2083mi M1 5w30

[Mighty HD]

Sure I'm going to get flamed again for the short run time of the oil..oh well.

 

[AndyH]

Quote:

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Sure I'm going to get flamed again for the short run time of the oil..oh well.

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LOL, no kidding. Why bother running Mobil 1 for 2,000 mile OCI's? Any quality conventional oil can EASILY perform just as well over such a short interval.

Anyway ... as Blackstone mentioned, the viscosity seems a bit high for M1 5W-30. Heck, 70.0 SUS @ 210 is the viscosity of a 40-weight oil. Did any of your previous UOA's show viscosity increases like this?

 

[TooSlick]

This is the Mobil 1, 5w-40, ie Delvac 1 and not their 5w-30. You can tell by the absence of MoDTC and the presence of approx 400 ppm of magnesium.

Since you live in Florida, the regular M1/10w-30 will probably work best. I see no advantage in going with the 5w-40, based on this data set.

TS

 

[Mighty HD]

That's right, I did have 5w-40 T&SUV in it. I forgot to change the paperwork before sent it in.

I put in M1 5w30. Jeez I must have been out of it.

 

[TooSlick]

Mighty HD,

Why not throw caution to the wind and try a 3000 mile OCI?

Baby steps...