Emailed RP regarding basestocks on SN oils.

Pennzoil motor oil
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donnyj08

donnyj08

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I emailed RP this: i would like to know if the base stocks used in the API SN oils are hydrocracked group III oils or if they are primarily PAO group IV as many other high end synthetics.

Their reply was:

"Good morning Donny,"

"Although Royal Purple oil formulations are considered proprietary, I am authorized to share with you that we use a proprietary combination of premium synthetic Group IV(PAO) and Group V base stocks. The additive packages are also the very best available for each."

Being the SN oils are not group III may explain why their SN oils are 7-10$ a quart.

I thought this would be interesting to share with you fellow BITOG members
-Donny
 
I read just about every royal purple thread that comes up. They get a beating from most of the members here.
Personally I like some of their stuff. Here in Canada their oils are super expensive however I've got a friend at parts plus who buys me stuff with his discount when it comes on sale.
Group 4/5 eh. I assume that's what we are after isn't it.
 
Originally Posted By: lexus114
then why do some people on here call their SN oil; "watered down"?

Maybe it's "watered down" compared to other RP oils, but not compared to other SN oils.

RP has been historically known for having very robust additive packs. SN does not allow it, so obviously their SN oils (at least the Xw-20 and Xw-30 grades) can't have it.
 
Originally Posted By: Clevy
I read just about every royal purple thread that comes up. They get a beating from most of the members here.


And most of them have never even used it. RP is blamed for everything under the sun that goes wrong (flat tires, chipping paint, cracked windshield, etc.). Ignorance to the core by the haters.
 
Originally Posted By: bullwinkle
RP is EXCELLENT oil-now if they could just get the price a little lower...


I suspect the quality of basestocks is what is keeping it a few dollars a quart higher than most.
 
Originally Posted By: gfh77665
Originally Posted By: Clevy
I read just about every royal purple thread that comes up. They get a beating from most of the members here.


And most of them have never even used it. RP is blamed for everything under the sun that goes wrong (flat tires, chipping paint, cracked windshield, etc.). Ignorance to the core by the haters.

I must admit I liked the rp/mobil mustang cam thread. That cam from the rp engine looked new. The mobil cam from the engine with half the mileage and ended up with a spun bearing definitely looked more worn,even though the valley was almost imperceptible with whatever measuring device the member used.
But is it repeatable. Driving habits would affect the outcome as much as or more than the oil itself(assume)
 
This all makes me think I need to go back and stock up at Pep Boys while I can get 5 quarts of RP SN 5w30 and an RP filter for $30 + 6% sales tax. Their sale ends at the end of the month.

I just put RP in my Nissan a couple weeks ago and will probably run it 7500 miles. I have another 5-quarts and filter in my garage cabinet for the next fill. But for $30 + tax, I might pick up 10 more quarts and 2 filters and have a stock that'll last me nearly 2 years.
 
Well, this is good to know. Up to now they've been kinda tight lipped about the SN oils. The best used oil analysis I ever got on my F150 was with RP SL 5W20. Normally, this oil is way to rich for my cheapskate habits but I wouldn't "kick it outta bed" at the right price.
 
I just wonder if the new non-synerlec rp protects as well as the old synerlec formula,because that's what rp claimed made their oils superior. I used to be able to get it at 46 a quart,and had an impeccable uoa with it. I wonder how the sn formula fares compared to the synerlec formula?
 
Last edited:
Im Extremely pleased with the feedback and tech service from RP. not only did they respond, in only 10 hours time, they answered my questions and gave me a slew of information on their other products.They told me where to find their products and they even told me if i had anymore questions on their products, to ask.

RP seems to be open about sharing details about their formulas, with one exception being synerlec.

Im well pleased with their customer values. there have been a few companies that have not even responded to my emails in the past.

thumbs up to RP for customer service.
 
I've used some RP products in the past and currently run their SyncroMax gear lub' in my BMW's gearbox with good results.
I don't like their 5W-20 and 5w30 oils for their low VIs and very high price here in Canada. Some of their other grades are interesting but nothing leading edge.
For example their 0W-40 seems to be a decent oil but it's not on par with M1 and is more expensive so why bother with it.
 
Originally Posted By: donnyj08
Im Extremely pleased with the feedback and tech service from RP. not only did they respond, in only 10 hours time, they answered my questions and gave me a slew of information on their other products.They told me where to find their products and they even told me if i had anymore questions on their products, to ask.

RP seems to be open about sharing details about their formulas, with one exception being synerlec.

Im well pleased with their customer values. there have been a few companies that have not even responded to my emails in the past.

thumbs up to RP for customer service.


I am curious what they do from here now that they have been purchased by Calumet.

As far as the quality of the brand itself, they make some excellent products. One of their oils tested by PQIA contained 3 x the max amount of sulfur allowed by the API though.

Synerlec is their proprietary additive and their claim to fame for the most part. They make some very unique racing oils with ultra low viscosity.

Their PDS's should be more readily available and updated.
 
Originally Posted By: buster
Originally Posted By: donnyj08
Im Extremely pleased with the feedback and tech service from RP. not only did they respond, in only 10 hours time, they answered my questions and gave me a slew of information on their other products.They told me where to find their products and they even told me if i had anymore questions on their products, to ask.

RP seems to be open about sharing details about their formulas, with one exception being synerlec.

Im well pleased with their customer values. there have been a few companies that have not even responded to my emails in the past.

thumbs up to RP for customer service.


I am curious what they do from here now that they have been purchased by Calumet.

As far as the quality of the brand itself, they make some excellent products. One of their oils tested by PQIA contained 3 x the max amount of sulfur allowed by the API though.

Synerlec is their proprietary additive and their claim to fame for the most part. They make some very unique racing oils with ultra low viscosity.

Their PDS's should be more readily available and updated.


buster, it is disappointing their PDS sheets do not show a good deal of info, however, it is comforting to know im going to get a reply if i do want to know something about their oils structure or properties.

Also what exactly is sulfur used for in a motor oil? was it an SN version of RP or the older SL formulation?

-Donny
 
I tried the SL 5w20 after seeing Jim's success, but after being here a while I have settled on PU, which looks just as capable of long OCI, for half the price....
 
Originally Posted By: CATERHAM
I've used some RP products in the past and currently run their SyncroMax gear lub' in my BMW's gearbox with good results.
I don't like their 5W-20 and 5w30 oils for their low VIs and very high price here in Canada. Some of their other grades are interesting but nothing leading edge.
For example their 0W-40 seems to be a decent oil but it's not on par with M1 and is more expensive so why bother with it.


If what the tech said is actually true (the group 4/5 basestocks), then maybe their 0W-20's VI is low(er/ish) because they add NO VIIs at all, and count on the basestock blend to give them their total VI level (like MPT does)???
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