Double-Super-Secret 5W-40 Audi RS4 Racing Oil
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Reason I ask is a 16.2 cSt oil or even a 15.5 cSt oil is still a 40 wt and will when diluted with fuel tend to "stay in Grade" much better than a oil that is a 40wt but vis is low at say 12.5
Bye the way just ran vis on a RLI 5/40 oil and was 16.7 cST at 100C.
maybe my vis machine is off.
bruce
bruce
Bye the way just ran vis on a RLI 5/40 oil and was 16.7 cST at 100C.
maybe my vis machine is off.
bruce
bruce
Hey, we're linked on RLI's website!
http://www.renewablelube.com/products/racing.htm
(So's my thread on M3Forum.com...
)
http://www.renewablelube.com/products/racing.htm
(So's my thread on M3Forum.com...
It is, by design.
What I'm driving at is oils blended to the high vis end will stay in grade longer than other oils blended to mid vis nothing new there.
In the case of the RLI sample I tested of suposed to be a 40wt was a 50 wt will resist vis loss due to fuel dilution over any oil 40wt just cause it starts thicker.
So I believe when comparing oils for "fuel" dilution it is important to look at starting vis.
A mid vis 40wt will fall of grade faster than a low end 50wt not a good comparison.
The kitchen sink addtive system is IMHO what gives the low wear rates. Certainly would not pass SM at all but is not a warranty oil.
bruce
You're measurement is actually a bit higher than ours. We measured 16.1 100C viscosity vs. 16.7. That could be within reasonable measurement uncertainty. Interestingly enough, most 5W-40 oils tend to be designed at the low end of the 40W range. It's interesting, since they are generally loaded with low-cost VIIs that shear down hard. I would bet that HTHS also shears significantly.
We saw two well-known 0W-40 and 5W-40 oils shear to 100C viscosities of:
9.7 in 2600 miles
9.9 in 2900 miles
10.2 in 7000 miles
That would make them great 5W-25 oils.
Your point about higher starting viscosity is well taken. The oil was designed to stay in grade with shear. However, when I actually compute the % shear, RLI comes in much better than all other 502 oils. So yes, starting at a higher viscosity does allow the oil to stay in grade after shear, but something more is going on here, since the oil is still more shear stable.
We saw two well-known 0W-40 and 5W-40 oils shear to 100C viscosities of:
9.7 in 2600 miles
9.9 in 2900 miles
10.2 in 7000 miles
That would make them great 5W-25 oils.
Your point about higher starting viscosity is well taken. The oil was designed to stay in grade with shear. However, when I actually compute the % shear, RLI comes in much better than all other 502 oils. So yes, starting at a higher viscosity does allow the oil to stay in grade after shear, but something more is going on here, since the oil is still more shear stable.
There are exspensive very shear stable VII's avalible which could acount for perhaps 30%-40% more stable oils compared to a lower SSI VI improver, that and higher starting vis will give a oil that has the best chance to stay in grade.
As I said the "kitchen sink" additive system on top of a Diesel pak is very robust I would love to see under valve cover shots out at 20K or so.
bruce
As I said the "kitchen sink" additive system on top of a Diesel pak is very robust I would love to see under valve cover shots out at 20K or so.
bruce
or no VII but a big shot of a PAO would also work
bruce
bruce
Actually, let me correct myself. What I meant to say was that after viscosity shear, the viscosity shear range for BioSyn in this engine is much smaller than other oils measured. This makes Biosyn much more predictable across a wider range of conditions.
I'm not going to pull the valve cover, since it's a RPITA to do it on this engine, but I can probably get a high quality shot with a macro lens through the oil fill that shows a bit of one of the camshafts. I've got close to 15K miles of run time on the engine with Biosyn right now. 20K is not far off. I'll take a picture then.
Interesting, I wonder how this oil would perform in my D12(12 litre volvo diesel).
Although it doesn't need it at all (13 ppm iron after 27,000 miles)
Although it doesn't need it at all (13 ppm iron after 27,000 miles)
Also, has anyone run a VOA on this stuff, since it is now available to the public?
yeah but is secret
bruce
Bruce, since run testing on the RLI BIOSYN SHP HD 5w40 oil why don't you post your own VOA of the fluid. No one is hiding anything, just don't have the time and money to post for free for the world to see...
You must know much more than you are sharing here if you can comment continually on the product.
As an independent tester I would like to see it posted from your lab.
Terry
You must know much more than you are sharing here if you can comment continually on the product.
As an independent tester I would like to see it posted from your lab.
Terry
All these secrets.
Here I thought it was a public forum mainly to SHARE INFORMATION.
Here I thought it was a public forum mainly to SHARE INFORMATION.
All secrets EXCEPT the actual proportion and construction part of the additive package system...
That, my friend, is why we pay to get VOA's done.
That, my friend, is why we pay to get VOA's done.
VOA's don't show everything.
Look at their data sheet, not too much info there. I've seen worse, but they don't even indicate ht/hs which is a pretty standard spec. All they list is "greater then 2.9".
So even if the average joe like me orders a quart, pays for shipping, pays for brokerage/duty fees across the border, and finally for a VOA, I still won't have all the information compared to other oils.
Look at their data sheet, not too much info there. I've seen worse, but they don't even indicate ht/hs which is a pretty standard spec. All they list is "greater then 2.9".
So even if the average joe like me orders a quart, pays for shipping, pays for brokerage/duty fees across the border, and finally for a VOA, I still won't have all the information compared to other oils.
Your original post asked for a VOA. There are no restrictions on VOA's is my only point. If you want one, get one.
As for the other info that you "can't get", how much info are you looking for? Valvoline and Castrol don't publish their HTHS either, but you can get it if you ask. Have you asked RLI?
As for the other info that you "can't get", how much info are you looking for? Valvoline and Castrol don't publish their HTHS either, but you can get it if you ask. Have you asked RLI?
RLI 5w/40
Spectro all in PPM:
Iron: Chromium: Aluminum: 2
Lead: Copper: 207
Tin: Silver: Silicon: 9
Boron: Potassium: Moly: Phosphorus: 1627
Zinc: 1751
Calcium: 3707
Barium: Magnesium: 17
Antimony: 523
Vanadium: Chlorinated Compounds: 300
(Or may have an inactive Sulfur Ester as indicated below, which can interfere with chlor test)
Total Sulfur %wt: 0.518 Compared to Castrol GC Green, Total Sulfur %wt 0.383
Vis @ 40C: 95.06
Vis @100C: 16.7 (50wt)
VI : 191
Conventional HDEO add pak.
With added Copper (Oleate/Naphanate?) as a AO
With added Antimony (Van Lube 73?) as a AW/FM
Maybe Added Chlorinated paraffin as a AW/EP
Maybe Added Sulfur Ester as a FM
Spectro all in PPM:
Iron: Chromium: Aluminum: 2
Lead: Copper: 207
Tin: Silver: Silicon: 9
Boron: Potassium: Moly: Phosphorus: 1627
Zinc: 1751
Calcium: 3707
Barium: Magnesium: 17
Antimony: 523
Vanadium: Chlorinated Compounds: 300
(Or may have an inactive Sulfur Ester as indicated below, which can interfere with chlor test)
Total Sulfur %wt: 0.518 Compared to Castrol GC Green, Total Sulfur %wt 0.383
Vis @ 40C: 95.06
Vis @100C: 16.7 (50wt)
VI : 191
Conventional HDEO add pak.
With added Copper (Oleate/Naphanate?) as a AO
With added Antimony (Van Lube 73?) as a AW/FM
Maybe Added Chlorinated paraffin as a AW/EP
Maybe Added Sulfur Ester as a FM
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