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Royal Purple HPS 10w40, October 2019 #5253272 10/29/19 03:11 PM
Joined: Feb 2009
Posts: 8,846
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440Magnum Offline OP
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I want to like Royal Purple, I really do. But I'd like a lot less "meh" for the dollar to be honest. And the fact that it says "Indiana" on the label now instead of "Porter, TX" doesn't help.

ROYAL PURPLE HPS-190920.jpg

'66 Dodge Polara & '69 Dodge Coronet R/T both 440/727
'08 Ram 1500 4.7/545RFE
'12 Challenger SRT8 392/6-speed
'99 XJ 4x4 4.0/AX15, '14 WK2 4x4 3.6/8HP
Re: Royal Purple HPS 10w40, October 2019 [Re: 440Magnum] #5253504 10/29/19 06:54 PM
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donnyj08 Offline
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Add pack looks decent. Flashpoint seems kinda low for a premium Synthetic.

Probably a good oil for an old hot rod.

Last edited by donnyj08; 10/29/19 06:55 PM.

2008 Silverado LT Z71 99k PP 10w30
2016 Tucson Limited 1.6T AWD 32k M1 5w30 AP
2016 Yamaha XSR900 13k, Spectro 10w40, Yamaha Filter.
Re: Royal Purple HPS 10w40, October 2019 [Re: 440Magnum] #5253521 10/29/19 07:04 PM
Joined: Dec 2006
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aquariuscsm Online Content
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I wonder what the XPR lineup looks like?


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 0W20

Re: Royal Purple HPS 10w40, October 2019 [Re: 440Magnum] #5253525 10/29/19 07:07 PM
Joined: Aug 2018
Posts: 1,006
RDY4WAR Offline
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It looks like a pretty generic SN+ add pack with 50% more ZDDP and moly. Boring.

For most older hot rods, I'd rather have the higher P-V coefficient and nearly same add pack with Valvoline VR1. Either that or a far better add pack in Driven GP-1 which is also cheaper.


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Royal Purple HPS 10w40, October 2019 [Re: aquariuscsm] #5253526 10/29/19 07:08 PM
Joined: Aug 2018
Posts: 1,006
RDY4WAR Offline
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Originally Posted by aquariuscsm
I wonder what the XPR lineup looks like?

Royal Purple XPR 5w-30.png

"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Royal Purple HPS 10w40, October 2019 [Re: 440Magnum] #5253531 10/29/19 07:14 PM
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addyguy Offline
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I have to say, I like it - not too thick 40-weight; nice shot of moly and boron; and good amounts of Zn and P.

Really surprised TBN isn't higher with the amount of Ca and Mg there is - should be closer to 9, no?


2010 Kia Soul 2U - 2.0L I-4, auto; 149k miles.
Castrol Edge (black bottle) 5W-30; Fram TG 9688.

2009 Pontiac G5 - 2.2 I-4, auto, 121k miles.
Oil/filter TBD
Re: Royal Purple HPS 10w40, October 2019 [Re: RDY4WAR] #5253543 10/29/19 07:26 PM
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aquariuscsm Online Content
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Originally Posted by RDY4WAR
Originally Posted by aquariuscsm
I wonder what the XPR lineup looks like?




Good looking oil!


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 0W20

Re: Royal Purple HPS 10w40, October 2019 [Re: 440Magnum] #5253670 10/29/19 09:45 PM
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Gubkin Offline
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KV100 = 12,6 cSt
low limit SAE J300 for SAE 40

Re: Royal Purple HPS 10w40, October 2019 [Re: 440Magnum] #5278372 11/26/19 08:43 PM
Joined: Dec 2018
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Loobit Offline
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It's because most modern synthetics have become boutique oil. You can get a low volatility, high detergent synthetic anywhere now for a good price. I still like Royal Purple HMX though because they add a ton of detergent and TBN is above 10. Probably the best high mileage oil out there. RP recently changed HMX to "Meet or exceed API SN" without the donut. I wonder what they changed. It used to be API SL with a donut symbol..

Re: Royal Purple HPS 10w40, October 2019 [Re: Loobit] #5278373 11/26/19 08:46 PM
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RazorsEdge Offline
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I plan on trying Royal Purple HMX at some point, just not sure what vehicle I will use it for 😉


Schaeffers Oils

2015 Ford Escape
1987 Ford Mustang - Vortech Supercharged 😎
Re: Royal Purple HPS 10w40, October 2019 [Re: 440Magnum] #5279315 11/27/19 09:52 PM
Joined: Dec 2012
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jakewells Offline
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That is a meh oil.


1996 Chevy 1500 4.3 V6. Harvest King 5W40 Fram XG3980 oil filter
Pennzoil sycromesh >> transmission
Shell rotella nitrite free ELC >> radiator
Shell Spirax HD 80W-90 >> rear axle


Re: Royal Purple HPS 10w40, October 2019 [Re: 440Magnum] #5280205 11/29/19 07:52 AM
Joined: Jul 2015
Posts: 5,208
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SR5 Offline
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I like it, a synthetic oil with a strong add pack.
Good Moly (134ppm), good Boron (96 ppm) and lots of Zinc (1218 ppm).
With a healthy Ca and Mg (1223 + 653 = 1876 ppm) detergent / TBN package.

For comparison vanilla M1 5W30 was recently tested here
Mo = 75, B = 94, Zn = 758, Ca = 1034, Mg = 734 , Ca + Mg = 1768
Don’t get me wrong, not dissing M1, a very well respected oil made on good base stock. Just saying the RP has a solid add pack.


BTW just to add that an ICP oil analysis atomises the molecules and counts the atoms (so to speak) so moly figures are directly comparable, regardless if they are using tri-nuclear moly or not.


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Valvoline DuraBlend 10W40 SN & A3/B4 semi-synthetic + Valvoline V06 synblend media filter
Re: Royal Purple HPS 10w40, October 2019 [Re: SR5] #5280349 11/29/19 11:04 AM
Joined: Aug 2018
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RDY4WAR Offline
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Originally Posted by SR5

BTW just to add that an ICP oil analysis atomises the molecules and counts the atoms (so to speak) so moly figures are directly comparable, regardless if they are using tri-nuclear moly or not.


Not always. ICP can't distinguish what the moly comes from. It can't tell if it's Molyvan 3000 (friction reducer), Molyvan 855 (friction reducer, anti-wear), or Vanlube BHC (anti-oxidant), for example. Some oils contain as many as 4 different types of moly-containing compounds blended together.

The friction reduction with trinuclear MoDTC at 135 vs 75 ppm is marginal and certainly not enough to overcome the increased friction that accompanies the higher ZDDP content. (Which the majority of engines won't benefit from anyway.) If I were a betting man, I'd put money on M1 5w-30 having a lower friction coefficient than RP HPS if both were run in an SRV.

Last edited by RDY4WAR; 11/29/19 11:06 AM.

"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Royal Purple HPS 10w40, October 2019 [Re: RDY4WAR] #5280634 11/29/19 06:31 PM
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Posts: 5,208
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SR5 Offline
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Fair enough RDY4WAR, your detailed analysis is the way to go.

I was more commenting, that sometimes when you point at lowish Moly numbers on a M1 product, a fanboy jumps up and says “trinuclear moly !! ..... we still win !!!”, when I think the numbers should be taken at face value unless you know something exact about the formulation of the add pack used (real chemical information) or something exact about mechanical test of the oil (real wear / friction numbers).

Yes I think M1 is a great oil, but I also think this RP has a fine add pack. A lot of Japanese motorcycles call for a 10W40 oil with high ZDDP, I would certainly give this a go in that application. Like you said not too much moly, so it should be OK with wet clutches, as I’ve seen MC specific oils with a bit of moly before.


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Valvoline DuraBlend 10W40 SN & A3/B4 semi-synthetic + Valvoline V06 synblend media filter
Re: Royal Purple HPS 10w40, October 2019 [Re: RDY4WAR] #5280720 11/29/19 08:24 PM
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SR5 Offline
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Thanks mate, good to know.

I have no knowledge of the company history. I’ve pick up RP a few times, but in Oz it’s way expensive, we are talking $95 for 5L. Tin that !!! So I put it back down again.

Right now I can get Shell Helix Ultra 5W40 on sale at $37 for 5L. A full GTL synthetic that is rated API SN/CF; ACEA A3/B3, A3/B4; BMW LL-01; MB 229.5, 226.5; VW 502.00/505.00; Porsche A40; Renault RN0700, RN0710; PSA B71 2296, and Ferrari approved. Or the high Moly, Nulon 10W40 fast-flow full synthetic also for about $42 (5L) everyday, and much less on sales.

I’m just chatting BTW, because I like to talk oil. Right now I’m using Valvoline DuraBlend 10W40 semi-Synthetic that is SN & A3/B4, got it on sale, and my car calls for a Euro rated A3 40 grade oil.


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Valvoline DuraBlend 10W40 SN & A3/B4 semi-synthetic + Valvoline V06 synblend media filter
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