Used Oil Analysis - Post Them Here
Er... you might want to drop Blackstone a note and let them know your make up oil was one qt and not 4.5. Ask them if that makes any difference on your analysis. (If it doesn't, why the hell do they ask?)
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This is a very good report, especially for 84k miles.
The insolubles of .2 (oxidized solids), and low 8ppm silicon ( 12ppm normal high limit), show that you could even run the oil longer and your filters are working good.
This Valvoline is working and you don't need another uoa for about 10-20k miles, but the high chromium might come down later if you thicken up to some xw40 oil.
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They are not dangerously low but they are low in comparison to other full synthetics. I have never bought into the hype that is RP. Heck those numbers are in line with a Castrol GTX 10W30. I would try something else and do a double oil change just to see what happens. Rotella T6 5W-40 is $25 a jug and tests well, I would give that a try.
I was just gunna go to 0w40 redline at my next change, should be good enough no? or does this just prove that there is no point wasting an *** load of money on "premium" synthetics lol
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Redline is good stuff, at least it meets recomended specs and is certified. Try it, test it, and see how it does, if you don't like it you can always switch. That is what I did until I settled on Mobil1 0W-40. The Rotella T6 5W-40 actually tested very well in my car but for some reason I just feel better using the Mobil1 even though it costs much more.
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Redline is good stuff, at least it meets recomended specs and is certified. Try it, test it, and see how it does, if you don't like it you can always switch. That is what I did until I settled on Mobil1 0W-40. The Rotella T6 5W-40 actually tested very well in my car but for some reason I just feel better using the Mobil1 even though it costs much more.
FWIW I have the 10w60 in at the moment.
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Your second change has almost 11 cst @ 100 deg c , and the moly, and silicone from the new oil and build is lowering.
This uoa looks good, and your thickness is close enough or on the money depending on how hard you drive.
The 8 comes with like a 5w20 oil with lots of molybenum as do most cars now, and the 8 takes several changes to get up the viscosity since as most of us know here that you might only get half your oil out on a change.
Your second change has almost 11 cst @ 100 deg c , and the moly, and silicone from the new oil and build is lowering.
This uoa looks good, and your thickness is close enough or on the money depending on how hard you drive.
Your second change has almost 11 cst @ 100 deg c , and the moly, and silicone from the new oil and build is lowering.
This uoa looks good, and your thickness is close enough or on the money depending on how hard you drive.
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not bad report but I would go with redline oil..it is in the same price range as royal purple but it has much more stable viscosity since it is ester based oil. their 5w30 provides protection of 5w-40 wight oil due to its high HTHS numbers.
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Last I heard Redline didnt get licensed for API SM nor have they gone SN. I think they declined as they would have had to reduce their ZDDP content. Been awhile since I read about it though. They easily pass specs with the exception of the ZDDP and the HTHS of the 5w20, 5w30, and 10w30 street oils.
FWIW I have the 10w60 in at the moment.
FWIW I have the 10w60 in at the moment.
It shouldn't make a difference, I use a pump as well.
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So after I got my results I actually sent them over to RP because I wanted to gauge their reaction, here is their reply:
Good Afternoon,
At first I was a little perplexed by the lower than spec viscosity at 100°C, and variation in additive elementals reported vs. what the oil should have. The most recent report mentions that residual oil from the previous oil change (5W-30) could easily explain that, and I agree. Residual oil could also account for the unexpected additive elementals. When you switched to RP SAE 5W-30, was this from the factory/dealer installed oil, or some other 5W-20? The change in viscosity (and therefore formulation) at each change is likely contributing to the anomalous reported values. If you have decided on a particular oil brand and viscosity, try sticking with it for a couple of oil changes and samples and the values (visc. and additives) will likely stabilize. To summarize, I do not see any compelling reason that the oil could not have continued service, but I would like to see the values stabilize in the next sample. Again, it is important to use the same oil, otherwise a large amount of variability will be introduced.
I would like to see a sample on the next change. Let me know a couple of days before you change the oil and I will send a kit out to you. We won’t charge anything, as I am interested in if my theory is correct. If you are curious, you can send another sample to Blackstone at the same time and see how well we correlate.
Thanks for choosing Royal Purple and have a great day!
Best Regards,
Christopher Barker
Technical Services
At first I was a little perplexed by the lower than spec viscosity at 100°C, and variation in additive elementals reported vs. what the oil should have. The most recent report mentions that residual oil from the previous oil change (5W-30) could easily explain that, and I agree. Residual oil could also account for the unexpected additive elementals. When you switched to RP SAE 5W-30, was this from the factory/dealer installed oil, or some other 5W-20? The change in viscosity (and therefore formulation) at each change is likely contributing to the anomalous reported values. If you have decided on a particular oil brand and viscosity, try sticking with it for a couple of oil changes and samples and the values (visc. and additives) will likely stabilize. To summarize, I do not see any compelling reason that the oil could not have continued service, but I would like to see the values stabilize in the next sample. Again, it is important to use the same oil, otherwise a large amount of variability will be introduced.
I would like to see a sample on the next change. Let me know a couple of days before you change the oil and I will send a kit out to you. We won’t charge anything, as I am interested in if my theory is correct. If you are curious, you can send another sample to Blackstone at the same time and see how well we correlate.
Thanks for choosing Royal Purple and have a great day!
Best Regards,
Christopher Barker
Technical Services
And yea I surely will, I will get one from BSL as well to compare just as he mentioned. I responded and let him know that I am running their 5w3 for winter, I was gunna run a 0w4 after i finished this interval but based on his reply I may run another interval or two on the 5w3 just to make sure my results aren't skewed due to residuals.
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http://www.mobil.com/USA-English-LCW...eage-5w30.aspx
Just a quick one... will using synthetic be ok? or in your opinion you'll still opt to use closest to conventional oil as much as possible? and what's the double ester from motul 300v means?
Last edited by vX-2; Nov 20, 2011 at 02:31 PM.
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UOA Study
Here's a quick and dirty analysis of the UOAs from this thread FWIW. I didn’t discriminate between synthetic/mineral, premix/no premix, or S1/S2. I can if there is interest update as we get more data and will fish the net for other reports as well. Any keying errors will only result in immaterial variances. Id ignore the viscosities of the 5w20 and 5w30 as there are 0 values that are unduly influencing those averages. I didnt see where Id be able to upload the actual Excel file, sorry.
