Quaker State Ultimate Durability vs. Royal Purple

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Anyone have an opinion on Quaker State Ultimate Durability when compared to Royal Purple? I'm not looking to increase my OCI, just trying to find comparable protection (heat, stress, wear). RP has the mysterious "Synerlec", but Quaker State Ultimate Durability is way cheaper. Any thoughts on switching to Quaker State Ultimate Durability?
 
If you really want to know about wear, there's no way to know without rigorous testing and serious oil analysis (not the cheapo $20 reports).
 
Im probably way out of my league here, but its to my understanding that RP seems to make engines run cooler, ie a motorcycle in desert heat. Not so sure its made for extremely long oci. I know nothing about QS nor Pennzoil, i never use their products
 
In all fairness, you should be aware that statements like "Brand X makes engines run cooler" are risky to make
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Basically, is RP in a league by itself or can Quaker State Ultimate Durability provide comparable results? Not with regard to OCI but with regard to heat & wear protection. Any ideas?
 
Thats why i gave a specific example (motorcycle) im sure ill get backlash, but in your above post i contend you know youre not comparing apples to apples
 
Quaker State Ultimate Durability is made by the largest lube oil mfg. and supplier in the world (Shell Oil Products). Royal purple is one of the smallest. IMO both of them make great oils. You pays your money and takes your choice as the saying goes. FWIW--Oldtommy
 
Two very different products and prices. RP is a great oil many like it. I UseQuaker State Ultimate Durability fairly regularly and for the money I think it is one of the best oils out there. I choose for the most bang for the buck so I get Quaker State Ultimate Durability. If they were the same price I would try RP. Like you have in your signature, they all feel the same pretty much and do the same (those oils listed), it is just a personal preference. Peoples engines have run countless miles on a good conventional oil.
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If the cheapest properly rated oil keeps the parts seperated and the additives do their job, 10 times more seperation and additives will not make any difference.
 
i ran RP 10w30 in my boat (gm 4.3l using lake water to cool) in my boat last yr, paid right around $50 for the oil and P1 filter, this yr i ran napa syn (valvoline w less add pack) bought a case for $32 10w30, couldnt tell any difference whats so ever on any level. I dont do QS as they change their flavor all to frequent for me. instead of that id opt for Edge or M1 or maybe Valvoline syn pwr. My 2 cents
 
Originally Posted By: HBCALI
Basically, is RP in a league by itself

Not in any way that matters.


Originally Posted By: HBCALI
or can Quaker State Ultimate Durability provide comparable results? Not with regard to OCI but with regard to heat & wear protection.

Maybe, maybe not. Again, there's no way to know without a lot of testing.
 
I went from Royal Purple to Quaker State Torque Power in my car this Fall and the Quaker State Torque Power was WAY smoother and slicker.
 
I think you can probably run RP longer than Quaker State Ultimate Durability. Is that what you're looking for? On 10k or shorter OCIs,Quaker State Ultimate Durability wins for performance per $
 
Both are good oils but RP is much more expensive. RP will also handle a longer OCI better than QS. RP has a pretty massive starting TBN. I wouldn't look at RP unless you are wanting to do 10k+ OCIs.
 
Originally Posted By: kcfx4
Im probably way out of my league here, but its to my understanding that RP seems to make engines run cooler, ie a motorcycle in desert heat. Not so sure its made for extremely long oci. I know nothing about QS nor Pennzoil, i never use their products



I noticed that when I tried it a few years ago.
 
Those are two completely different oils. The QS is a low cost group III, and the RP is a higher priced group IV. It is like comparing a McDonald's burger to a Fudruckers burger.


RP had some problems with the viscosity shearing down a few years ago, but from recent UOA, they seem to have solved that problem.
 
Originally Posted By: Loobed

Those are two completely different oils. The QS is a low cost group III, and the RP is a higher priced group IV. It is like comparing a McDonald's burger to a Fudruckers burger.

Not sure how you draw a conclusion about performance based on the price of the product. I would think economies of scale would have a huge impact on the price, since SOPUS is a far bigger company than Royal Purple.

Could you elaborate a bit?
 
Originally Posted By: d00df00d
Not sure how you draw a conclusion about performance based on the price of the product. I would think economies of scale would have a huge impact on the price, since SOPUS is a far bigger company than Royal Purple.

Could you elaborate a bit?


I can't answer for Loobed, but I think there are a few issues to consider, not the least of which is what you mentioned regarding company size. Target market is another issue.

SOPUS makes oils for just about everyone. If one wants cheap house brand oil at under $2 a quart or a high mileage oil or an HDEO or a reasonably priced synthetic or PU at a higher price (or even a few more niche products, like say Pennzoil Ultra Euro, wherever it's available), then SOPUS has a product, and a quality one at that, to fit that need. For the most part and with few exceptions, those products can be very easily found, from Walmart to Canadian Tire to any parts store to many gas stations.

Secondly, while I'm not a fan of companies being shadowy of oil group content, I'm well aware, and Shell obviously is to a greater degree, that Group III type synthetics perform just as well as Group IV or V synthetics. For SOPUS, from a business perspective, there's not point in offering a more expensive base stock across their product line for no discernible, across the board improvement in performance. SOPUS products are often on sale, and the size of SOPUS along with the fact that they're not using expensive base stocks unnecessarily helps. The bulk of SOPUS customers want a quality product that fulfills warranty requirements at a reasonable price. Quaker State Ultimate Durability fits that description perfectly, as do most products across the SOPUS line.

RP has a different target base. Some people do care about Group III vs. Group IV, particularly if the prices are close (i.e. I can get RP marginally cheaper than non-sale Quaker State Ultimate Durability, and substantially cheaper than non-sale PU - so if I'm not too concerned about API/ILSAC specs, why pay more for a Group III than a Group IV?) Others find certain aspects of RP (or any other boutique oil) more appealing to them for their application than what the big companies offer. RP 0w-40 has some good specs, and, at least here, finding something comparable requires the purchase of GC or Mobil 1 0w-40, and all three (when not on sale) are priced within a few cents of each other. Or, if someone wants a Group IV oil, and they want it thicker than GC or Mobil 1 0w-40, the SOPUS options are extremely limited, and perhaps non-existent in North America. RP has other options.

Some don't care about an oil being SM or SN, and want more ZDDP. RP does that, across a wide range of viscosities, without them being classified as a high mileage oil, either.

Personally, I like RP, but I don't think it's "better" than anything else out there. It depends upon what one wants or needs or thinks one needs for one's application. For my old F-150 for example, I think I need more ZDDP, and certainly don't need SN oil. I could, conceivably, use RP in there, and there are enough viscosities from which I could choose. On the other hand, I consider it overkill, and there are plenty of conventional HDEOs in various grades that would do the trick for me.

SOPUS is in no danger from RP. Neither is BP or ExxonMobil. SOPUS owns the conventional market, and ExxonMobil owns the synthetic market. RP and other boutique oils rightly target different consumers.
 
Preaching to the choir, my friend. I'm well aware of all of that.
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The question was simply about Loobed's reasoning.
 
Originally Posted By: d00df00d
Originally Posted By: Loobed

Those are two completely different oils. The QS is a low cost group III, and the RP is a higher priced group IV. It is like comparing a McDonald's burger to a Fudruckers burger.

Not sure how you draw a conclusion about performance based on the price of the product. I would think economies of scale would have a huge impact on the price, since SOPUS is a far bigger company than Royal Purple.

Could you elaborate a bit?



I never mentioned performance. I would rather buy and use Quaker State than Royal Purple. I have no use for RP in any of my vehicles, and I probably don't even need synthetics. When I made the burger analogy, I didn't mean that one tasted better than the other, or that one was more healthy than the other. I was just comparing price.
 
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