Royal Purple (Molybdenum Disulfide)

Hey Moto, check your PMs I sent ya one earlier. Also gave ya a call at work. Had a question bought my RP...

[J'ville]

As an Amsoil Dealer, I am partial to their product. But you have never heard me disc RP. I even told Mr.Hemi that RP may be better suited for a supercharger application than Amsoil. RP has always been performance oriented.
Another reason I don't disc RP is because RP is rarely mentioned in Amsoil comparison tests. That should tell you somthing. Amsoil seems to have the advantage in long term applications but RP seems better suited for extreme high-performance usage.
When it comes to apples vs apples, I do downgrade Castrol Syntec due to its partial conventional molecular makeup. Better than dino brands, but way down the totempole on the synthetic list.
How about it Motohead, has your company done any comparisons? Good or bad, Lets hear it.

[Motohead]

I hope it wasn't anything I said that warranted your response. I was not, nor would I ever point fingers.

The only testing "we" do is for QC and R&D purposes; it is not our strategy to cast stones at our competitors. In-house testing is subject to bias as any testing sequence will have repeat and reproduceability margins of error. A good example if this was an issue of Sport Rider I picked up about two years ago. They were testing oils and Castrol Syntec outperformed Amsoil on their own four-ball wear test (.29 repeatablity mm margin: .44 mm reproduceability margin per ASTM description). Is it conceivable Castrol outperformed Amsoil? Sure. Do I think it's the norm? Absolutely not. I think the margin of error of bench testing can be slanted anyway you want it to especially with a single data point.

However, yes, we do have comparitive data between the two collected from NC State University performed on State vehicles and local fleets. The 42-page NCSU report is posted on our site in which all the oils are called out by name, but in the summary we list it simply as RP vs. a "premium synthetic."

summary
full report

[Freeze]

That's a great read, Moto. The AMSOIL/RP Diesel comparo was interesting. That's as far as I'm going with it tonight, but I'll pick it up tomorrow. I'm just too tired right now. Do you think some of that friction reduction was due to the moly, which seemed to be the major difference in formulation between RP and AMSOIL? I don't know how AMSOIL's diesel formulations compare to their oils for gas engines, or if they're the same just different weights. I'm babbling now and am gonna hit the rack. Blah blah blah...

[jlhram]

Oh great and powerful Lubrication specialist, Thanks for all the info, I was just wondering what's your take on filters. I have been using the K&N gold. As always I am very appreciative of all the help. Posts: 170Â*|Â*Location: Roanoke, TexasÂ*|Â*Registered: 20 August 2004

[Motohead]

Freeze - I signed a non-disclosure on RP's additive technology my first day on the job, so I really can't comment other than saying it's Synerlec that's the difference. However, the primary component of Synerlec won't apprear in a typical trend oil analysis.

jlhram - the K&N is an excellent filter, but a little too pricey in my opinion. I do oil analysis on all of my vehicles and have always been happy with the Wix when factoring price and performance. The NAPA Gold Series is identical to the Wix (made by Wix). I run the K&N on my bikes because that little nut on the casing makes life so much easier and I only change them once a year.

[Freeze]

Awwww, come on........how 'bout now? Hehehe... I totally understand, though.

I like the WIX.. My Grandpa got me on them, and all my fam uses them.

[Gilitar]

Hey Motohead, what gives Royal Purple it's color? Posts: 8Â*|Â*Location: Mobile, ALÂ*|Â*Registered: 20 February 2005

[Motohead]

It's a dye just like the red dye used by all manufacturers in ATF. There's a story behind the reasoning why - something to do with industrial applications - and it has grown into a company trademark.