How good is Royal Purple

Pennzoil motor oil
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I too am looking for a VOA/UOA on the RP SN oils, preferably 10w40 but I can't find analysis data for any other weights either.

We have 8 pages of opinion and speculation here with very little data. I ran regular RP w/synerlec (pre SN) in a car that had a tendency to sound a little rough at high revs and the RP smoothed it out noticeably. I've also seen a few A/B used oil analysis now where RP has shown noticeably lower wear metals vs. other oils.

I run Mobil 1 0w40 (happily) in my Euro car so I have no brand bias, but I do feel RP has its place and would love to see more data on it.
 
I feel that RP SL bridged the gap between passenger oils and racing oils. It was an amazing oil capable of extended drain and high performance. Once I learned they were discontinuing it, I picked up a couple cases. It wass a really good fit for my truck.

RP SN is entering into a tough market dominated by much lower priced oils like M1, SYNpower, and Edge. I cannot imagine that is going to work out well for RP.
 
Originally Posted By: dparm
Originally Posted By: Clevy
The API stuff doesn't contain synerlac


Yes it does. The 5w40 is API SL and still contains Synerlec.


I apologize if I wasn't clear on what I mean't. I meant to say that the API SN doesn't contain synerlac.
Synerlac is what makes royal purple special. Its a great anti-wear additive and friction modifier.
I used up alot of my RP stock this summer in my fox,10w-30 and honestly I thought it was great. I beat that car every single time I drive it. I'm intentionally trying to kill it with extreme driving abuse just to see exactly how far I can go.
The 302 had a waterfall of a rms leak but motor oil saver fixed that.
I've got maybe 20 quarts of RP left. Its the euro spec 5w30 and 5w-40. Both contain synerlac.
Synerlac is a sulfur containing additive,which is why its not in the SN version of their oils. Mos2 is a friction modifier and also contains sulfur,and I'm sold on mos2's abilities,which leads me to believe synerlac is similar in composition and effects.
The synerlac stuff is top notch. Better than just about anything else out there as far as quality and wear control.
I put RP with synerlac up there with redline in that they are super additized and could make the difference between winning and losing on the track. In a typical passenger vehicle they are total overkill,unless of course you plan on keeping the vehicle forever and the extra cost of the oil could translate to less maintenance or longer engine life.
Here it costs 15 a quart minimum. If I'm going to spend that kind of money I'll buy ultra,which justifies the added cost with extended oil drains.
Synerlac is like moly on steroids however today's off the shelf oils are taking typical passenger vehicles to unheard of mileages,so one has to ask themselves if they truly require an oil like that.
I'm going to use my euro stuff in my chev this winter. I shouldn't need mos2 with it.
Anyways royal purple is a great oil,and the SN approved stuff is every bit as good as any other premium syn out there but if I'm buying it its the hps stuff I'm after. That stuff is special.
 
Originally Posted By: coolbird101
Originally Posted By: CATERHAM
Originally Posted By: JOD
Originally Posted By: DragRace


There is no recipe,period. This website is known for RP bashing.This used to be a website to goto for reliable,hard facts you could learn about,but anymore,it's full of misinformation.In the real world useage of this oil,I've seen engines tore down for both street and track that have run Royal Purple oils with no issues.


Wow, the persecution complex of those who like a particular oil is just baffling to me. If "not having issues" is the benchmark for an oil...well, that's a pretty low bar. Here are the facts: the oil appears to have very average NOACK, VI and -30 pumpability--specs on which it's surpassed by Quaker State UD, which is significantly less money. That's not "hate", those are cold hard facts: PQIA Test Results

Sure, specs don't tell you everything, but they do give some insight. It's reasonable to believe that if RP used a significantly "better" base oil, some basic specs like NOACK and -30C mPa would be better relative to its competition. As such, it's hard to really see the value in it given the information that's out there, at least to me. It doesn't make it "bad oil", I just don't see why I would choose it relative to other oils if it's priced higher (and it is where I've seen it). If that's "hate", then I really don't know what to say??

JOD you're right, and based on those spec's it's pretty clear to most of us here that the basic RP grades like their 5W-20 and 5w30 are GP III based oil. Now there is nothing wrong with that but is it worth the price they're charging for it? IMO no.

Thank you for the insight as to what you guys are looking at in the specs, I must not be in the majority of the 46k members we have, as I cant simply look at specs and determine base oil and overall quality. I have been over simplifying by looking at used oil analysis and wear numbers. I am slowly learning.
Originally Posted By: buster
Can anyone locate actual PDS's for RP WITH ACTUAL DATA on them? I even called RP and they sent me the same PDS that is off their website. No numbers at all. I get it, they don't want to get wrapped up in the "numbers game" that companies like Amsoil engage in. But without any figures, how do you know what you're getting?

My wife's Mazda 3 has had a steady diet of Mobil 1. The car is driven hard and has held up extremely well. 2007 with 83k miles. I was considering trying RP HPS in it as it's one of the only brands I never tried.


Give it a shot buster. You've always shown to be open minded and I'd like to hear you're opinion after actually using it.

The hps stuff is what you want.
I'm interested in actual data on RP. They get bashed to no end here so it would be nice to actually have something from a lab so we could discuss something tangible.
I used the auto 20w-50 with synerlac in my Harley and honestly it was the quietest running oil ever in that bike. And it just swallowed up miles and as far as sound goes the bike never got more noisy in the top end.

HNHEMI
Thank you for sending in a used oil analysis. I'm interested in your results.
My girls windstar uses 5w-20. Its still got 6000km to go before its next change interval ,which puts us into winter.
I'm considering running a sump load of the euro in her van however being winter its going to get a 20 minute warm up every morning and what I've got in stock is 1 and 2 grades thicker then the van requires. Being winter I short change and use conventional because she gets significant fuel dilution so I don't think using the RP I've got in stock under these types of conditions would be a very good sample to test.
And in my truck it will take a year to get enough miles to be worth testing.
I'm brainstorming,trying to find an application I can use what I've got in stock to use,then test to help the forum with some actual data on royal purple.
Or maybe I can donate a sump load to someone on the condition they test their current sump,to establish a baseline,then test the RP I give them.
Maybe my truck is the ideal candidate. Its high mileage and calls for a 30 grade,so the euro spec being a 30 and 40 grade won't be going too far out of line.
Synerlac being a friction modifier may help the -35 winter starts.

Anyone local to me have any ideas. I'll donate the oil,or work out something so the forum can have some real data on RP.

Pm me with some ideas
 
Surely someone has UOA/VOA numbers on the new RP (SN) so we can compare ZN/P and Moly numbers with the old oil. Maybe it's not that different, no way to tell without data.
 
Originally Posted By: zaibatsu
Surely someone has UOA/VOA numbers on the new RP (SN) so we can compare ZN/P and Moly numbers with the old oil. Maybe it's not that different, no way to tell without data.


Check out the pqia. They've got a voa on almost every oil on the market. Google them. The info is on that site
 
Originally Posted By: Gabe
I feel that RP SL bridged the gap between passenger oils and racing oils. It was an amazing oil capable of extended drain and high performance. Once I learned they were discontinuing it, I picked up a couple cases. It wass a really good fit for my truck.

RP SN is entering into a tough market dominated by much lower priced oils like M1, SYNpower, and Edge. I cannot imagine that is going to work out well for RP.





Gabe;

RP HPS = RP SL.
 
Originally Posted By: zaibatsu
Surely someone has UOA/VOA numbers on the new RP (SN) so we can compare ZN/P and Moly numbers with the old oil. Maybe it's not that different, no way to tell without data.


The new RP API SN formula can not contain the same levels of additives as the old SL formula due to restrictions being an API SN certified oil. The new RP API SN stuff won't contain their Synerlec additive like the old SL stuff did. If you want that old SL performance buy the RP HPS( High Performance Street )line. It is basically the old SL stuff with a new name.

http://royalpurpleconsumer.com/product-categories/automotive/#!hps-motor-oil
 
Last edited:
Originally Posted By: buster
Can anyone locate actual PDS's for RP WITH ACTUAL DATA on them? I even called RP and they sent me the same PDS that is off their website. No numbers at all.

When they switched to SN and brought out the HPS line, the data sheets went down the toilet. Even when the data sheets were good, they were hard to find.
wink.gif
Nonetheless, there's nothing wrong with giving RP a try, especially if you can get it at a sensible price.

Up here, as far as retail prices go, it's relatively competitive. Since WM up here doesn't carry it, there aren't any deep sales on it, but that's the norm for oil up here. At "normal" overinflated retail prices, it's priced somewhere between M1 and Mobil 1 Extended Performance.
 
I find it hard to believe they don't offer a more detailed PDS. It's obvious they don't want to get into the numbers game, but I feel a PDS is still very important to have.
 
I agree absolutely, buster. I wish they had better ones. But, when it was the old SL formula, there was a weekly thread here with people trying to find the data sheets, and me trying to recreate my fumbling path to them to help out, since they were rather difficult to find at the time.

I wish they listed proper numbers for their HPS line, specifically. After all, if they've got some pretty impressive numbers and are free from ILSAC constraints, why not show off?
 
^I agree.

As I said above, they probably want to avoid comparing numbers, which some companies like to do (Amsoil). While it can give you some indication of the quality level, numbers can also be used to fool consumers into thinking one brand is better than another.

No PDS however, with no data at all, is just inexcusable to me.
 
Originally Posted By: buster
As I said above, they probably want to avoid comparing numbers, which some companies like to do (Amsoil).

Or, they think only nuts like us are interested in the numbers.
wink.gif
If I were RP, I'd at least put the ZDDP and moly levels on the data sheets for the HPS stuff. After all, that's the kind of stuff the performance guys would be interested in. They won't give two hoots about VI or even TBN. Although, I would confess that TBN is a good idea, to differentiate HPS from purpose built race only oils.

On a side note, just think of how good the various companies' data sheets would be if they gave their data to select BITOGers and let them have at it. I'm sure many of us would gladly do the job for free!
 
Originally Posted By: Gabe
I don't believe they are. The old SL formula had an Mg additive, high TBN and great cold flow properties - HPS doesn't

I don't know how I missed that VOA before. That's an insane amount of zinc, to the point I'd be cautious about it. At least it does have sufficient detergent, unlike real race oils.
 
Originally Posted By: Garak
Originally Posted By: Gabe
I don't believe they are. The old SL formula had an Mg additive, high TBN and great cold flow properties - HPS doesn't

I don't know how I missed that VOA before. That's an insane amount of zinc, to the point I'd be cautious about it. At least it does have sufficient detergent, unlike real race oils.


HPS is in the same ballpark as Penrite Racing which is much cheaper. If anything Penrite has the heavier add pack with 600ppm of Boron on top of the 1700ppm Zn. I do wonder if all the AW is not only overkill but detrimental.

http://www.penriteoil.com.au/pis_pdfs/710 TENTHS RACING OIL 5 JUNE 2013.pdf
 
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