GM AC DELCO 5W30

[oldhp]

What are your thoughts on this Dexos 5W30 from AC Delco. TBN, mg KOH/g, (ASTM D2896) 8.03 Viscosity @ 100ºC, cSt, (ASTM D445) 9.3 to 12.5 11.1 Viscosity @ 40ºC, cSt, ASTM D445 64.95 Viscosity Index (ASTM D2270) 164 Viscosity @ -30ºC mPa s (cP) (ASTM D5293) 6,600 Max 4,884 Volatility, mass % loss, 1 hr, @ 250ºC (ASTM D5800) 15 Max -c 7.9 ELEMENTAL ANALYSIS-b Additives Calcium 2,224 Magnesium 10 Phosphorus, ppm 600 to 800 803 Zinc, ppm 863 Molybdenum, ppm 83 Barium, ppm <1 Boron, ppm 248 Silicon, ppm 4 Potassium, ppm <5 Manganese, ppm <1 Titanium, ppm <1 Copper, ppm <1 Sodium, ppm 6 Vanadium, ppm <1 Contaminants Silver, ppm <1 Aluminum, ppm 2 Chromium, ppm <1 Iron, ppm 1 Nickel, ppm <1 Lead, ppm <1 Antimony, ppm <1 Tin, ppm <1 Volatility looks pretty good at 7.9 for a blend.

 

[Rosetta]

A good Semi-synthetic oil.

 

[Rosetta]

Dexos 1, right?

 

[oldhp]

Yes Dexos 1. Got the info off of the Petroleum Quality Institute.

 

[pbm]

Originally Posted By: Rosetta

A good Semi-synthetic oil.

I agree ....but since you can get full syns like M1, PP, PU etc...for about the same price, why bother... UOAs show these full syns hold up better in my Cruze's turbo 1.4...

 

[Indydriver]

Since Chevy is including four oil changes in the purchase price of my car (typically with this oil), I'm fine with it, as long as I can dictate the OCI, which my dealer allows. After my four changes, I will DIY, probably with M1.

 

[Benzadmiral]

Originally Posted By: Indydriver

Since Chevy is including four oil changes in the purchase price of my car (typically with this oil), I'm fine with it, as long as I can dictate the OCI, which my dealer allows. After my four changes, I will DIY, probably with M1.

Same here, though I'm planning on QSUD.

 

[oldhp]

How does GM get this oil to spec at 7.9 volatility? Which is lower than PP at 9.3??? And not that far off of Penn Ultra at 6.6???

 

[Rosetta]

I believe density should be in the high side, like 96 or even 97.

 

[MolaKule]

Originally Posted By: Rosetta

I believe density should be in the high side, like 96 or even 97.

Try This: http://www.engineeringtoolbox.com/sae-grade-oil-d_1208.html Density has to be specified at a specific temperature since it changes with temperature.

 

[ElastoHydro]

Originally Posted By: Indydriver

Since Chevy is including four oil changes in the purchase price of my car (typically with this oil), I'm fine with it, as long as I can dictate the OCI, which my dealer allows. After my four changes, I will DIY, probably with M1.

If you don't live in a dusty road area, the OLM (Oil Life Monitor) should tell you the perfect time to change the oil. GM researched and refined that for years.

 

[ElastoHydro]

Originally Posted By: oldhp

How does GM get this oil to spec at 7.9 volatility? Which is lower than PP at 9.3??? And not that far off of Penn Ultra at 6.6???

Pennz Ultra PurePlus, the latest & current one on the shelves, has a much higher NOACK now, not the old 6.6. Its true the ACDelco dexos1 exceeds the spec, as the max allowed is 12 or 13. I've heard there is some difficult variability in those NOACK tests. Hard to control test conditions or something. I'm not sure.

 

[ElastoHydro]

Boron is on the high side. Good amount of anti-wear additive. All the other numbers look about normal.

 

[ARCOgraphite]

This DELCO Semi-synthetic oil may have more TRUE synthetic base in it than "FULLY SYNTHETIC" which can be ZERO percent synthetic in North America. I might run it my NISSAN which surprisingly specs a 5w30 - though Pennzoil Bronze bottle HM 5w30 is dang gud stuff.