08-07-2009, 09:29 AM
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#1
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Registered User
Join Date: Dec 2008
Location: NV
Posts: 160
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Oil Analysts
In an effort to share knowledge which may be pertinent to our cars, I'd like to share 2 VOA's I have recentaly done.
Car: 986
Miles: 44,xxx
Oil: Royal Purple 5w-40
Elements:
Anti_F N
Fuel <.5
Water Neg
V100 13.3
OXI 15
NIT 6
Sulf 21
Cu 0
Fe 1
Cr 0
Pb 0
Al 3
Si 2
Mo 172
Na 5
Mg 15
Sn 0
Zn 764
Ni 0
K 3
Ca 1696
P 644
Second sample:
Car:964
Miles: 68,xxx
Oil: Redline 15w-50
Elements:
Anti_f N
Fuel <.5
Water Neg
V100 19.1
OXI 145
NIT 7
Sulf 133
Cu 0
Fe 2
Cr 0
Pb 0
Al 10
Si 1
Mo 686
Na 15
Mg 7
Sn 0
Zn 1180
Ni 0
K 3
Ca 2408
P 1007
I hope this can help in making some oil decisions.
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08-07-2009, 09:55 AM
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#2
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Registered User
Join Date: Jan 2009
Location: Pleasanton, CA
Posts: 114
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Sorry, but even if I was able to understand and interpret the oil analysis, any comparison is completely useless.
Two different cars, with two different types of engines, with different total age and mileage, driven under unknown conditions for an unknown number of miles, with different brand and weight of oil, is hardly a way to make any comparison, much less draw any conclusions.
__________________
Demick
'04 Boxster S
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08-07-2009, 10:07 AM
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#3
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Registered User
Join Date: Dec 2008
Location: NV
Posts: 160
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Quote:
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Originally Posted by demick
Sorry, but even if I was able to understand and interpret the oil analysis, any comparison is completely useless.
Two different cars, with two different types of engines, with different total age and mileage, driven under unknown conditions for an unknown number of miles, with different brand and weight of oil, is hardly a way to make any comparison, much less draw any conclusions.
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These were VOA's or Virgin Oil Analysts. I had the samples tested before I put them in the car. After I change the current oil out of the cars I'll have UOA's done, a UOA is useless with out first having a starting point. (IMHO)
As far as a drive report and miles, I'll include them with the UOA's.
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08-07-2009, 10:24 AM
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#4
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Registered User
Join Date: Jan 2009
Location: Pleasanton, CA
Posts: 114
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[QUOTE=941MXVET]These were VOA's or Virgin Oil Analysts. I had the samples tested before I put them in the car. After I change the current oil out of the cars I'll have UOA's doneQUOTE]
Ahhh, that makes sense. For us dummies, it would be nice to know how to interpret each line item.
Example:
Zn: Acceptable range: 500-2000. Higher number is better
^^^ like this, only I totally made up these numbers.
Demick
__________________
Demick
'04 Boxster S
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08-07-2009, 10:05 AM
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#5
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Registered User
Join Date: Jun 2004
Location: Des Moines, IA
Posts: 8,083
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Quote:
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Originally Posted by 941MXVET
In an effort to share knowledge which may be pertinent to our cars, I'd like to share 2 VOA's I have recentaly done.
Car: 986
Miles: 44,xxx
Oil: Royal Purple 5w-40
Elements:
Anti_F N
Fuel <.5
Water Neg
V100 13.3
OXI 15
NIT 6
Sulf 21
Cu 0
Fe 1
Cr 0
Pb 0
Al 3
Si 2
Mo 172
Na 5
Mg 15
Sn 0
Zn 764
Ni 0
K 3
Ca 1696
P 644
Second sample:
Car:964
Miles: 68,xxx
Oil: Redline 15w-50
Elements:
Anti_f N
Fuel <.5
Water Neg
V100 19.1
OXI 145
NIT 7
Sulf 133
Cu 0
Fe 2
Cr 0
Pb 0
Al 10
Si 1
Mo 686
Na 15
Mg 7
Sn 0
Zn 1180
Ni 0
K 3
Ca 2408
P 1007
I hope this can help in making some oil decisions.
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Did they add a commentary. If so, can you post that?
Thanks
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Rich Belloff
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08-07-2009, 10:14 AM
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#6
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Registered User
Join Date: Dec 2008
Location: NV
Posts: 160
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Quote:
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Originally Posted by Brucelee
Did they add a commentary. If so, can you post that?
Thanks
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Yes, but because these were VOA's, an effort to record a starting point for further tests, I didn't bother posting them.
But since you asked, I'll be glad to pass them on!
Royal Purple
Comment: "Condition Satisfactory for this sample, resample at next scheduled interval."
Redline
Comment: "Condition Satisfactory for this sample, resample at next scheduled interval. Sample note: Had 15w-50 as grade."
I don't know why the lab included a sample note with the Redline sample and not the RP.
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08-07-2009, 10:21 AM
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#7
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,614
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Did they supply a "total base number" or "TBN"; I don't see it in your post?
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08-07-2009, 10:34 AM
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#8
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Registered User
Join Date: Dec 2008
Location: NV
Posts: 160
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Quote:
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Originally Posted by JFP in PA
Did they supply a "total base number" or "TBN"; I don't see it in your post?
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No, they didn't supply TBN. I need to look up exactly what "OXI" is an abrevation for. The E-mail I recieved from the lab is on my work computer, I'll try to access my account and find out. I suspect they might be related.
Demick, I'm not an expert, just an interested owner. There are a few members who's opinions I'd love to hear about these tests, and I don't mind providing the info!
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08-07-2009, 12:24 PM
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#9
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,614
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Quote:
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Originally Posted by 941MXVET
No, they didn't supply TBN. I need to look up exactly what "OXI" is an abrevation for. The E-mail I recieved from the lab is on my work computer, I'll try to access my account and find out. I suspect they might be related.
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TBN is a critical value as it is a strong indicator of the overall remaining life left in the oil. The elemental analysis is fine, buy you need to see physical properties as well (viscosities, fuel dilution %, antifreeze dilution %, water, insoluble’s, TBN, TAN, etc.) in the final report for both the before and after analysis………………
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12-06-2009, 09:22 PM
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#10
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Registered User
Join Date: Jan 2009
Location: Corona, CA.
Posts: 129
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Quote:
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Originally Posted by 941MXVET
Car: 986
Miles: 44,xxx
Oil: Royal Purple 5w-40
Elements:
Anti_F N
Fuel <.5
Water Neg
V100 13.3
OXI 15
NIT 6
Sulf 21
Cu 0
Fe 1
Cr 0
Pb 0
Al 3
Si 2
Mo 172
Na 5
Mg 15
Sn 0
Zn 764
Ni 0
K 3
Ca 1696
P 644
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I'm no oil genius, but it sure doesn't look like there is an abundance of Zinc (Zn) and Phosphorus (P) in that oil. According to this chart https://www.mobiloil.com/USA-English/MotorOil/Files/Mobil_1_Product_Guide.pdf , even the much-maligned Mobil 1 0w40 has more Zn & P than the 5w40 Royal Purple. On the plus side, if your car burns oil the catalysts won't be quickly poisoned.
__________________
Blue-S
2000 Boxster S 6-speed - Ocean Blue / Savanna Beige
* 9x7 short shifter * Pedro's enthusiast mount * Carrera Ltw. wheels * Stebro bypass pipes
* M030 coming soon! *
Last edited by Blue-S; 12-06-2009 at 10:07 PM.
Reason: additional info added
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12-08-2009, 04:13 AM
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#11
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Registered User
Join Date: Apr 2006
Location: Boston, MA
Posts: 221
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More UOA results
I've always have done UOA's on my cars since the early '80's. Here's the trending summary for my '07 Boxster S. Although I agree with JFP regarding the TBN test, I only had it done once since I change my oil at approx 7500 mile intervals (to minimize the fuel dilution -- keeps it under 2%). Most people believe that the TBN is only needed for monitoring long drain intervals (time to change the oil when TBN is either less than 2% or 1% depending on which ASTM method the lab uses), but I think that JFP was eluding to the fact that weird things can happen inside the crankcase (excessive acidity) that would delete the additive(s) faster than expected (I've seen this happen before in a friend's car).
The bottom line is to have the UOAs done and trend the data to keep an eye on what's going on in your engine.
Also, some labs to use are Blackstone, Staveley, Polaris, Bently and many others.
Regards,
paul...
PS: If anyone wants my Excel spreadsheet to use, send me a PM with your email as I can't post it here.
Last edited by paulv; 12-08-2009 at 04:16 AM.
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