Royal Purple & Amsoil

[PurpleHaze]

Last week in another thread I was asked why I would speak negative about Royal Purple oil. Well I spent some time doing research on the web for info. This below is what I found. If you can find any info that disputes what I have found, I would love to see it.
As you may know, Royal Purple is well known in racing circles. The chemistry they use is something AMSOIL, Inc. chooses not to use. One of our big selling points is extended drain intervals. Some additive chemicals can cause adverse conditions when used for long periods.
Royal Purple uses a different chemistry than most oils. They are one of only a handful of marketers using Molybdenum Disulfide (Moly) in their oil. Moly is a solid material, which is specifically banned by Cummins®, due to excessive valve train wear.
Moly is a processed mineral that is similar in appearance to graphite. Moly has good lubricating properties when used either by itself (in dry power form or as an additive to oil or other lubricants). Particles of the Moly can come out of suspension and agglomerate. This can actually clog oil filters or oil lines and the rest normally settles in the bottom of the oil pan. This seems to be more likely when using extended drain intervals. The only test we ran on Royal Purple involved their 20W50 Racing oil versus our AMSOIL Series 2000 Synthetic 20W50 Racing Oil (TRO). We ran two 4 ball wear tests with different parameters, a spectrographic baseline, FTIR scan and volatility tests. The Royal Purple showed a significantly high volatility rate with a 12.51% boil off rate. This compares to the AMSOIL TRO with only a 4.47% volatility rating. Wear scars were also smaller with the TRO. For example the AMSOIL TRO left a .41mm scar and the Royal Purple oil left a .66mm scar. The lower the scare damage number the better! There was also a surprising difference in the viscosity index. The RP has a VI of 129 versus 155 for the TRO. The higher the VI, the better the viscosity stays in place at high temperatures.
Note: This information was provided by AMSOIL, Inc. Tech Department. An independent lab tested the Royal Purple 20W-50 racing oil against the AMSOIL 20W-50 racing oil. The results are posted above. Test results found Moly in the Royal Purple oil sample.

Amsoil vs Royal Purple:
This is just an FYI... it's not to start a debate, just throwing some number specs of each.

Viscometrics 40 degrees C cSt
- The lower the number, the better because it means better flow at low temperatures. This is important for the many in colder climates:
Amsoil Series 2000 0W-30.....57.9

Royal Purple 5W-30...........62.5
Amsoil XL-7500 5W-30.........58.4
Amsoil 5W-30.................59.5

Royal Purple 10W-30..........61.8
Royal Purple 10W-30..........67.3
Amsoil XL7500 10W-30.........64.0
Amsoil 10W-30................64.3

Royal Purple 10W-40..........94.0
Amsoil 10W-40................79.2


Viscosity Index
- The higher the number, the less change due to temperature.

Amsoil Series 2000 0W-30......188

Royal Purple 5W-30............160
Amsoil XL-7500 5W-30..........160
Amsoil 5W-30..................197

Royal Purple 10W-30...........144
Royal Purple 10W-30...........149
Amsoil XL7500 10W-30..........148
Amsoil 10W-30.................177

Royal Purple 10W-40...........149
Amsoil 10W-40.................183


Pour Point
- Again for those of you in colder climates. This is the temp that the oil will still pour at.

Amsoil Series 2000 0W-30.....<-76

Royal Purple 5W-30............-44
Amsoil XL-7500 5W-30..........-60
Amsoil 5W-30..................-60

Royal Purple 10W-30...........-40
Royal Purple 10W-30...........-49
Amsoil XL7500 10W-30..........-54
Amsoil 10W-30.................-60

Royal Purple 10W-40...........-49
Amsoil 10W-40.................-54



Flash Point
- The higher, the better able to withstand high temperature. This and the next one are important, especially with the heat turbos put out, or if
going to the track and running hot.

Amsoil Series 2000 0W-30......460

Royal Purple 5W-30............395
Amsoil XL-7500 5W-30..........464
Amsoil 5W-30..................442

Royal Purple 10W-30...........400
Royal Purple 10W-30...........400
Amsoil XL7500 10W-30..........471
Amsoil 10W-30.................446

Royal Purple 10W-40...........400
Amsoil 10W-40.................450


Fire Point

Amsoil Series 2000 0W-30......489

Royal Purple 5W-30............435
Amsoil XL-7500 5W-30..........478
Amsoil 5W-30..................442

Royal Purple 10W-30...........435
Royal Purple 10W-30...........445
Amsoil XL7500 10W-30..........478
Amsoil 10W-30................. ?

Royal Purple 10W-40...........435
Amsoil 10W-40.................450


Total Base Number (TBN)
- This is basically the additive package that keeps the oil alive. The higher the number the better. Most of these numbers for Amsoil are the
minimum they allow, usually the numbers I've seen are between 12 and 13!

Amsoil Series 2000 0W-30.....11.4

Royal Purple 5W-30...........10.5
Amsoil XL-7500 5W-30..........9.0
Amsoil 5W-30................>11.0

Royal Purple 10W-30..........10.5
Royal Purple 10W-30..........10.5
Amsoil XL7500 10W-30..........9.0
Amsoil 10W-30...............>11.0

Royal Purple 10W-40..........13.0
Amsoil 10W-40...............>12.0

 

[FutureZman]

Last week in another thread I was asked why I would speak negative about Royal Purple oil. Well I spent some time doing research on the web for info. This below is what I found. If you can find any info that disputes what I have found, I would love to see it.
As you may know, Royal Purple is well known in racing circles. The chemistry they use is something AMSOIL, Inc. chooses not to use. One of our big selling points is extended drain intervals. Some additive chemicals can cause adverse conditions when used for long periods.
Royal Purple uses a different chemistry than most oils. They are one of only a handful of marketers using Molybdenum Disulfide (Moly) in their oil. Moly is a solid material, which is specifically banned by Cummins®, due to excessive valve train wear.
Moly is a processed mineral that is similar in appearance to graphite. Moly has good lubricating properties when used either by itself (in dry power form or as an additive to oil or other lubricants). Particles of the Moly can come out of suspension and agglomerate. This can actually clog oil filters or oil lines and the rest normally settles in the bottom of the oil pan. This seems to be more likely when using extended drain intervals. The only test we ran on Royal Purple involved their 20W50 Racing oil versus our AMSOIL Series 2000 Synthetic 20W50 Racing Oil (TRO). We ran two 4 ball wear tests with different parameters, a spectrographic baseline, FTIR scan and volatility tests. The Royal Purple showed a significantly high volatility rate with a 12.51% boil off rate. This compares to the AMSOIL TRO with only a 4.47% volatility rating. Wear scars were also smaller with the TRO. For example the AMSOIL TRO left a .41mm scar and the Royal Purple oil left a .66mm scar. The lower the scare damage number the better! There was also a surprising difference in the viscosity index. The RP has a VI of 129 versus 155 for the TRO. The higher the VI, the better the viscosity stays in place at high temperatures.
Note: This information was provided by AMSOIL, Inc. Tech Department. An independent lab tested the Royal Purple 20W-50 racing oil against the AMSOIL 20W-50 racing oil. The results are posted above. Test results found Moly in the Royal Purple oil sample.

Amsoil vs Royal Purple:
This is just an FYI... it's not to start a debate, just throwing some number specs of each.

Viscometrics 40 degrees C cSt
- The lower the number, the better because it means better flow at low temperatures. This is important for the many in colder climates:
Amsoil Series 2000 0W-30.....57.9

Royal Purple 5W-30...........62.5
Amsoil XL-7500 5W-30.........58.4
Amsoil 5W-30.................59.5

Royal Purple 10W-30..........61.8
Royal Purple 10W-30..........67.3
Amsoil XL7500 10W-30.........64.0
Amsoil 10W-30................64.3

Royal Purple 10W-40..........94.0
Amsoil 10W-40................79.2


Viscosity Index
- The higher the number, the less change due to temperature.

Amsoil Series 2000 0W-30......188

Royal Purple 5W-30............160
Amsoil XL-7500 5W-30..........160
Amsoil 5W-30..................197

Royal Purple 10W-30...........144
Royal Purple 10W-30...........149
Amsoil XL7500 10W-30..........148
Amsoil 10W-30.................177

Royal Purple 10W-40...........149
Amsoil 10W-40.................183


Pour Point
- Again for those of you in colder climates. This is the temp that the oil will still pour at.

Amsoil Series 2000 0W-30.....<-76

Royal Purple 5W-30............-44
Amsoil XL-7500 5W-30..........-60
Amsoil 5W-30..................-60

Royal Purple 10W-30...........-40
Royal Purple 10W-30...........-49
Amsoil XL7500 10W-30..........-54
Amsoil 10W-30.................-60

Royal Purple 10W-40...........-49
Amsoil 10W-40.................-54



Flash Point
- The higher, the better able to withstand high temperature. This and the next one are important, especially with the heat turbos put out, or if
going to the track and running hot.

Amsoil Series 2000 0W-30......460

Royal Purple 5W-30............395
Amsoil XL-7500 5W-30..........464
Amsoil 5W-30..................442

Royal Purple 10W-30...........400
Royal Purple 10W-30...........400
Amsoil XL7500 10W-30..........471
Amsoil 10W-30.................446

Royal Purple 10W-40...........400
Amsoil 10W-40.................450


Fire Point

Amsoil Series 2000 0W-30......489

Royal Purple 5W-30............435
Amsoil XL-7500 5W-30..........478
Amsoil 5W-30..................442

Royal Purple 10W-30...........435
Royal Purple 10W-30...........445
Amsoil XL7500 10W-30..........478
Amsoil 10W-30................. ?

Royal Purple 10W-40...........435
Amsoil 10W-40.................450


Total Base Number (TBN)
- This is basically the additive package that keeps the oil alive. The higher the number the better. Most of these numbers for Amsoil are the
minimum they allow, usually the numbers I've seen are between 12 and 13!

Amsoil Series 2000 0W-30.....11.4

Royal Purple 5W-30...........10.5
Amsoil XL-7500 5W-30..........9.0
Amsoil 5W-30................>11.0

Royal Purple 10W-30..........10.5
Royal Purple 10W-30..........10.5
Amsoil XL7500 10W-30..........9.0
Amsoil 10W-30...............>11.0

Royal Purple 10W-40..........13.0
Amsoil 10W-40...............>12.0

amsoil is some expensive shit though... although i think in 1K miles, im waving goodbye to M1, and heading over to amsoil... See you later Mr.Benjamin..

:_slide_:

 

[grr456]

What is missing from those tests? More products are missing. If you really wanted a true side by side comparison, Mobil 1 and Valvoline synthetics should have been included at the very minimum.

I know of a very well known local company that recently DID do comparisons between many of the synthetics, for their racing program. Mobil 1 was very close to the top, second place I believe. Something that was specifically manufactured for the company was first and it cost several hundred dollars a quart, and everything else was way back in the distance......

My friend, who's worked for the company for 24 years, said that since the company spent several hundred thousand dollars for these tests, he wouldn't reveal anything more than he already told me. We got on the subject because I normally use Mobil 1 in all of my racing engines and I specifically asked if it was good.......

Just my .02

Gary

 

[Swifster]

I would agree with Gary. Hard for me to answer your poll since I wouldn't be using either one. I've been using Mobil 1 since 1989 and wouldn't use anything else. Pull the oil fill cap on my 2001 Ranger with 170K on it, and it's as clean as a baby's bottom. I also used Mobil 1 20W50 in my Suzuki SCCA race car and never had wear or deposit issues.

This isn't a sales pitch for Mobil 1 nor a knock on Amsoil or Royal Purple. Oil, spark plugs, filters, tires and other such items fall under those things that create the same kinds of arguments that you have when discussing sex, religion or politics. I could stand here all day and not convince you to use Mobil 1 and you could do the same with Amsoil and have no chance to convince me to switch either. And for the above 'non-biased' statistics above, if I've been using Royal Purple, I doubt it would cause me to change brands.

Considering how this was presented, I can only assume you are an Amsoil distributor. In that context I could not consider those statistics to be unbiased. And also considering I have a car that uses a flat tappet camshaft, zinc content is far more important to me at this point than the base stock. If molasses had enough zinc in it, I'd use it for my break in period before switching over to Mobil 1.