Patman
Staff member
More and more, I truly believe each lab is going to give a totally different set of results even with the same oil. I have yet to see an oil sample that has been sent to two different labs, come back looking even close.
In an attempt to determine which lab, if any, has the most accurate numbers I now have six sets of results to compare and contrast. I just got back two more results from Oil Analyzers.quote:
Originally posted by Greg Bohn:
I got looking at this oil because I normally go to a 'Valvoline Instant Oil change' for one of my cars. They claimed that they use the same oil as their retail bottle stuff, only in bulk form.quote:
Originally posted by dragboat:
...Are you using this oil presently,or just curious about it?
Since I didn't get a bulk sample from them the last time I had my oil changed, I figured I would buy a regular retail quart bottle and send in a sample.
I figured I could them compare the results of the bottled oil to my used oil analysis too see if the base additives looked similar or not.
What I have now are results from a recent sample of used motor oil sent to both labs (at the same time). I also have results of unused samples of the 'similar' retail bottled oil from the same two labs.
The results for Zinc, Phos, Calcium and Magnesium, as well as some metals from the used results are:
...
So, the Herguth results make the additive parts of the Unused and used oil look very similar. The Blackstone results look less similar (between used and unused) especially in the Calcium numbers.
I was hoping to compare at least the three labs 'used results' against each other, as well as the three 'unused' results against each other to determine which labs if any matched.code:
Used Oil Miles: 1,955
Used Engine Miles: 81,219
Herguth Herguth Blackstone Blackstone OAI OAI
Unused Used Unused Used Unused Used
--------------------------------------------------------------------
Zinc: 1,071 1,063 836 952 1,382 1,204
Phos: 1,042 994 735 792 1,144 1,014
Calcium: 2,149 2,148 1,655 1,971 2,642 2,874
Magnesium: 8 17 5 14 0 0
Boron: 5
Silicon: 15 18 3 10 0 12
Al: 2 5 0 3 0 9
Chromium:
Iron: 1 19 0 17 0 24
Copper: 1 6 0 5 0 7
Lead:
Tin: 1 1 0 1 0 1
Molybdenum: 1 17 0 13 0 20
TBN: 6.43 3.99 - 4.5 8.7 7.0
Visc: 10.10 9.13 61.3 SUS 56.3 SUS 10.2 cSt 9.6 cSt
10.58? cSt 9.15? cSt
Oxidation: Cm - - - 10%
Niration: Cm - - - 14.3%
code:
Oil miles 0
Total Miles 0
Herguth Blackstone
--------------------------------------------
TBN: 7.35 9.5
Vis @100 C: 10.08 cSt
Vis @210 F: - 59.9 SUS
= 10.19 cSt ?
Oxidation: < 2 - Abs/cm (Max. 30)
Water: < 0.10 % 0.0
Nitration: < 2 - Abs/cm (Max. 30)
Insolubles: - 0.0
Percent Fuel: < 2.0 % -
Glycol: < 0.10 % -
Iron: < 1 1
Aluminum: < 1 1
Chromium: < 1 0
Copper: < 1 0
Lead: < 1 0
Tin: < 1 0
Nickel: < 1 0
Silver: < 1 0
Silicon: 2 4
Sodium: 2 2
Manganese: - 0
Boron: < 4 0
Zinc: 1041 888
Phos: 911 786
Calcium: 1909 1563
Magnesium: 12 9
Barium: < 1 0
Molybdenum: 1 0
Vanadium: < 1 -
Titanium: - 0
Potassium: - 0
Yep, I've been specifying oil Brand/type/weight.quote:
Originally posted by dragboat:
I bet your disapointed. Man, all those tests and none seem close.
Are you telling the Labs what brand the oil is ?