2.3% fuel dilution and a trace of water tend to make most oils show bad results. However your wear metals still looked good, in fact very good. But most synthetics would do this also under those circumstances.
Royal Purple - Loses Viscosity????
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Yea, I need to figure out why I have the fuel dilution. An increase from 0.5% to 2.3% is significant, especialy with 1000 less miles and the same driving conditions. It did seem to protect well besides this, but after hearing so much about it shearing and then seeing it myself, I am no longer crazy about using it.
The whole reason I used it was to find a replacement for GC. If I was doing a shorter OCI I would still consider it though.
The whole reason I used it was to find a replacement for GC. If I was doing a shorter OCI I would still consider it though.
Patman
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There was no fuel dilution either. The lead levels came down considerably once I switched it over to GC as well.
I kept reading this thread and got concerned, so I changed my 6K, 18 month old Royal Purple and had a used oil analysis done. Lead of 1, scary.
Royal Purple used oil analysis
Royal Purple used oil analysis
It is interesting that certain applications RP does thin. With such little data and relatively high number of variables, it seems random.
Do any of you grill RP on why? (Kinda like BBQing my hiney gets when Amsoil thickens?)
As a side note: As BiTOG #7, "HotRod" vetteman says - my wear ain't no where - thus driving another spike in the coffin of "viscosity matters" (note: when Amsoil thickens - the wear stays low, when RP thins - the wear stays low. Whatup wid dat, jones?)
Do any of you grill RP on why? (Kinda like BBQing my hiney gets when Amsoil thickens?)
As a side note: As BiTOG #7, "HotRod" vetteman says - my wear ain't no where - thus driving another spike in the coffin of "viscosity matters" (note: when Amsoil thickens - the wear stays low, when RP thins - the wear stays low. Whatup wid dat, jones?)
Maybe it is the Synerlec(sp) in Royal Purple? anyone really know what that is?
The difference between my used oil analysis with GC and RP is minimal as far as wear elements, either the same or just 1 higher. The shearing is a bit of a concern, but may not be in RP case. Like you said, even though it thinned, it still seems to protect very well. I just don't think it is a extended drain oil (TBN of 0.8).
blupupher,
Your previous analysis was with more miles, (7.4K think) and the TBN was 3.0. Your current analysis the TBN is 0.8 with 2.3% fuel dilution and .4 Insoluables. And the wear still remained very close to the prior anaysis. And I do understand the frustration, but in honesty, you have to solve the fuel dilution problem or extended drains with any oil are mute.
I have not paid for a TBN in the last 10 used oil analysis that I have gotten for my vehicles and for my daughters. I am about to get shot for this statement but here goes: Terry has been able to interpet my used oil analysis without TBN, so the extra $10 bucks I save on TBN makes his interpetation pretty inexpensive. (Worth the price at any cost, I am just cheap). I have seen him read used oil analysis in person, and he did not even flinch without a TBN reading. He was like a computer spitting out data faster than I could absorb it. His ability was amazing to watch.
I have had a few emails and PM's asking why I defend Royal Purple because they are not a Sponsor on the site. And why don't I only use Sponsor products. My answer is always the same, I like to try and test as much as I can and report my findings good or bad. It is ironic because for 2 years I have contacted Royal Purple by email to try and get them to be a Sponsor and they won't even give me the courtesy of a response. But this site is about ALL oils and associated products and trying to find which are beneficial or are just so-so.
I am out of RP, so my next test I am using Delvac 1300s and 5W40 Mobil 1 Truck/SUV in one truck and the other will be using Schaeffer's 15W40 again. In my wifes car I will be using Red Line 5W20. I have had super results with Synergyn 5W30 and now ready to drop the Synergyn 3W30. Also had good results on Red Line 5W30 in it.
Your previous analysis was with more miles, (7.4K think) and the TBN was 3.0. Your current analysis the TBN is 0.8 with 2.3% fuel dilution and .4 Insoluables. And the wear still remained very close to the prior anaysis. And I do understand the frustration, but in honesty, you have to solve the fuel dilution problem or extended drains with any oil are mute.
I have not paid for a TBN in the last 10 used oil analysis that I have gotten for my vehicles and for my daughters. I am about to get shot for this statement but here goes: Terry has been able to interpet my used oil analysis without TBN, so the extra $10 bucks I save on TBN makes his interpetation pretty inexpensive. (Worth the price at any cost, I am just cheap). I have seen him read used oil analysis in person, and he did not even flinch without a TBN reading. He was like a computer spitting out data faster than I could absorb it. His ability was amazing to watch.
I have had a few emails and PM's asking why I defend Royal Purple because they are not a Sponsor on the site. And why don't I only use Sponsor products. My answer is always the same, I like to try and test as much as I can and report my findings good or bad. It is ironic because for 2 years I have contacted Royal Purple by email to try and get them to be a Sponsor and they won't even give me the courtesy of a response. But this site is about ALL oils and associated products and trying to find which are beneficial or are just so-so.
I am out of RP, so my next test I am using Delvac 1300s and 5W40 Mobil 1 Truck/SUV in one truck and the other will be using Schaeffer's 15W40 again. In my wifes car I will be using Red Line 5W20. I have had super results with Synergyn 5W30 and now ready to drop the Synergyn 3W30. Also had good results on Red Line 5W30 in it.
Good point. I've said this before, but viscosity is just one factor to how well an oil can protect. Look at some of the european car manuals. They recommend 30wt all the way to 50wt depending of the temperature. Most cars can run on various viscosity oils without any problems. We've seen great oil analysis results on all viscosity grades. Somtimes you have to "fine tune" your oil's viscosity to match the engine, but over all, it really isn't a big deal what you use.
59 Vetteman, I agree. I am not trying to bash Royal Purple. I really wanted it to give me a good UOA, and as far as wear, it did not do to bad. Heck, RP is made locally so I would be supporting my local economy, and I have a cheap supplier of it.
I know I need to figure out the fuel problem, which I am in the process of doing. Next oil change/UOA was going to be a basic shorter run to check and see if the fuel problem is fixed.
I will probably try it again once my stash of M1 and GC are done and use a 15w40 (not for about 3 yrs though).
I know I need to figure out the fuel problem, which I am in the process of doing. Next oil change/UOA was going to be a basic shorter run to check and see if the fuel problem is fixed.
I will probably try it again once my stash of M1 and GC are done and use a 15w40 (not for about 3 yrs though).
My local Auto-Parts store just went up to $4.49 qt. And many other locations if you can even find it, the price is high. That is why I am now testing my brew of Delvac 1300S and Mobil 1 Truck/SUV.
The RP oil gave me some wierd oil pressure readings. When cold, the reading was at 70-75 PSI. As the engine came up to tempreture, the oil pressure would drop to about 50 PSI at cruise.
When I run Shell Rotella 15w40, the cruise PSI is about 60.
This unscientific test shows that RP is thin at tempreture.
When I run Shell Rotella 15w40, the cruise PSI is about 60.
This unscientific test shows that RP is thin at tempreture.
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