GM AC DELCO 5W30

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2,871
Location
High Tax Illinois
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.
 
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pbm

Messages
8,889
Location
New York
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...
 
Messages
2,220
Location
Indiana
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.
 
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Messages
5,763
Location
Da Swamp
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

Thread starter
Messages
2,871
Location
High Tax Illinois
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???
 
Messages
218
Location
Florida
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.
 
Messages
218
Location
Florida
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.
 
Messages
16,010
Location
N.H, U.S.A.
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.
 
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