wemay
Site Donor 2023
Not a comparison thread, just curious.
Royal Purple API: Grp III or Grp IV?
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The API stuff is likely a group III base with other base oils.
wemay
Site Donor 2023
That's my belief as well. But I couldn't find pseudo confirmation anywhere. 'Pseudo' because we never really know based on what the oil co. tell us.
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Group III, but depending on grade it will have a higher group V content (Synerlec).
wemay
Site Donor 2023
Originally Posted By: dparm
Group III, but depending on grade it will have a higher group V content (Synerlec).
5w30 / 10w30?
Group III, but depending on grade it will have a higher group V content (Synerlec).
5w30 / 10w30?
Isn't synerlec a sulfur compound? (which is NOT in the ILSAC AOI starburst cert lubes) IIRC the performance oils show high sulfur - maybe Im incorrect .... IDK.
Originally Posted By: ARCOgraphite
Isn't synerlec a sulfur compound? (which is NOT in the ILSAC AOI starburst cert lubes) IIRC the performance oils show high sulfur - maybe Im incorrect .... IDK.
It's a sulfurized-ester.
Here is what RP tech support told me a while back:
The only RP SAE street oil that still contains Synerlec is the 5W-40 (part #01540, quart bottle). The update to API SN and ILSAC GF-5 required compliance with chemistry restrictions that precluded the use of Synerlec and required a reduction in anti-wear additive. We did introduce a new line of performance street oils, though. Royal Purple HPS oils are an improvement of the older street synthetic oils, all containing a generous dose of Synerlec and high levels of anti-wear additive. Unfortunately, they will likely need to be special ordered through a local Napa, O’Reilly or CarQuest, or you can get them online at Jegs.com, Lucky7Trucks.com, PacePerformance.com, and SummitRacing.com.
Isn't synerlec a sulfur compound? (which is NOT in the ILSAC AOI starburst cert lubes) IIRC the performance oils show high sulfur - maybe Im incorrect .... IDK.
It's a sulfurized-ester.
Here is what RP tech support told me a while back:
The only RP SAE street oil that still contains Synerlec is the 5W-40 (part #01540, quart bottle). The update to API SN and ILSAC GF-5 required compliance with chemistry restrictions that precluded the use of Synerlec and required a reduction in anti-wear additive. We did introduce a new line of performance street oils, though. Royal Purple HPS oils are an improvement of the older street synthetic oils, all containing a generous dose of Synerlec and high levels of anti-wear additive. Unfortunately, they will likely need to be special ordered through a local Napa, O’Reilly or CarQuest, or you can get them online at Jegs.com, Lucky7Trucks.com, PacePerformance.com, and SummitRacing.com.
In reference to the above, even in the SL days (and SM for their Euro oils), I always wondered why the 5w-40 oil (with the Euro specs) had Synerlec, while the 0w-40 Euro oil did not.
Originally Posted By: dave1251
The API stuff is likely a group III base with other base oils.
Originally Posted By: dave1251
The API stuff is likely a group III base with other base oils.
I think the API stuff is group 3 however their higher shelf products have pao and ester in varying percentages.
The synerlec stuff is something special. Their API stuff is on par with all other API synthetics.
The API stuff is likely a group III base with other base oils.
Originally Posted By: dave1251
The API stuff is likely a group III base with other base oils.
I think the API stuff is group 3 however their higher shelf products have pao and ester in varying percentages.
The synerlec stuff is something special. Their API stuff is on par with all other API synthetics.
A year or so back, Meijer clearanced all of the old API SL stuff for as little as $3.42/qt.
By that time, there wasn't enough left for a couple of oil changes.
It would have been interesting to have run the "with Synerlec" API SL 10w30 for two or three changes in one of the cars and then UOAed it.
The price certainly would have been right, had I been there soon enough to grab 15 quarts or so at the killer price.
By that time, there wasn't enough left for a couple of oil changes.
It would have been interesting to have run the "with Synerlec" API SL 10w30 for two or three changes in one of the cars and then UOAed it.
The price certainly would have been right, had I been there soon enough to grab 15 quarts or so at the killer price.
Royal Purple has a large shelf display at my Walmart. It is very expensive, more than double the price of some of the other full synthetics near it. It's not going in my cars.
Wemay, why not keep running Edge but in a 30 weight viscosity? I thought you were set on Castrol.
wemay
Site Donor 2023
Originally Posted By: cheesepuffs
Wemay, why not keep running Edge but in a 30 weight viscosity? I thought you were set on Castrol.
I can't find the 0w30 in jug size, or for the price Walmart sells it. I'm ok with it though, Valvoline will do just fine. Gone full circle...lol
Wemay, why not keep running Edge but in a 30 weight viscosity? I thought you were set on Castrol.
I can't find the 0w30 in jug size, or for the price Walmart sells it. I'm ok with it though, Valvoline will do just fine. Gone full circle...lol
Originally Posted By: wemay
Originally Posted By: cheesepuffs
Wemay, why not keep running Edge but in a 30 weight viscosity? I thought you were set on Castrol.
I can't find the 0w30 in jug size, or for the price Walmart sells it. I'm ok with it though, Valvoline will do just fine. Gone full circle...lol
Gotcha.
Originally Posted By: cheesepuffs
Wemay, why not keep running Edge but in a 30 weight viscosity? I thought you were set on Castrol.
I can't find the 0w30 in jug size, or for the price Walmart sells it. I'm ok with it though, Valvoline will do just fine. Gone full circle...lol
Gotcha.
All royal purple products, the API certified, HPS and XPR line are mainly all group IV PAO synthetic with some group V esters. I emailed RP this exact question about a year ago and Chris Barker from tech service replied as such. Unfortunately due to the length of time I do not have that email but you can email them personally if you so wish.
wemay
Site Donor 2023
Originally Posted By: deven
All royal purple products, the API certified, HPS and XPR line are mainly all group IV PAO synthetic with some group V esters. I emailed RP this exact question about a year ago and Chris Barker from tech service replied as such. Unfortunately due to the length of time I do not have that email but you can email them personally if you so wish.
Interesting... if true, this would explain the price premium.
All royal purple products, the API certified, HPS and XPR line are mainly all group IV PAO synthetic with some group V esters. I emailed RP this exact question about a year ago and Chris Barker from tech service replied as such. Unfortunately due to the length of time I do not have that email but you can email them personally if you so wish.
Interesting... if true, this would explain the price premium.
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The RP Synerlec oils are the best of the best imo (I have an impeccable uoa to back it up),but the api oils,I have no idea how they compare to other over the counter synths. I`ve wondered if they`re grp IV as well.
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wemay
Site Donor 2023
Originally Posted By: JSRT4
It did well in this oil test, FWIW
http://www.animegame.com/cars/Oil Tests.pdf
Thanks for posting, but this is API SM. Not a current comparison of available SN formulations.
It did well in this oil test, FWIW
http://www.animegame.com/cars/Oil Tests.pdf
Thanks for posting, but this is API SM. Not a current comparison of available SN formulations.
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