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Is Royal Purple Really That Good?

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Old 01-28-2014, 02:49 PM   #21
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I used RP exclusively in my 02, 5 speed, I just switched to it in my 2012 5.0 (first oil-change) I never had any problems with heat and when I sold the 02 it ran smooth and I was getting 23 MPG average. I personally love the stuff.
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Old 02-12-2014, 06:08 AM   #22
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In just switched to rp in my 05 GT 5 speed. I had stock tranny fluid in it. I put rp ATF not the Synchromax. It still feels smother than the stock motorcraft. Also put 5w20 rp in the engine. Was running quackerstate. And used a knn filter to, they did not have a rp filter where I got my stuff at. I notice in that second video they did not clean off the machine after the first use.
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Old 04-11-2014, 09:15 PM   #23
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I know my manual tranny seemed smoother and shifted better when I initially put RP in over the stock oil. I am starting to think I may need to go back to a regular synthetic though.. not sure why, just feels like there isn't any oil in there, kinda like it is breaking down...?

If I were you, I'd stick with MOBILE 1 synthetic for the motor oil, plenty of history for long running engines on that. Seems to be some spotty stuff with RP. Best of luck whatever you decide.
I changed out the RP Synchromax for Valvoline Synchromesh (GM Spec) and it was a definitive improvement. No more overheating like it felt like the RP was doing. They need to work on their formulation, my guess is it does not transfer heat well, and makes the moving parts deteriorate from heat saturation.

I'd go with the GM Spec No. 9985648 (part no 12345349)

But what do I know, I'm just a rocket scientist....
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Old 04-20-2014, 01:48 AM   #24
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The Placebo Effect

One day I had a 13 yr. old student fall out of his chair in my class! He was obviously drugged so I investigated his source of the drug. Another student was the source and I caught him with his stash! To be cool and bad, he had given the drugged student a 80 Grain aspirin he got from home as drugs. When the drugged kid heard the news out of the drug pushers mouth he immediately got over being drugged! The placebo effect is very strong in all of us! Sometimes patients given a placebo treatment will have a perceived or actual improvement in a medical condition, a phenomenon commonly called the placebo effect.

Double-blind trials

Because a belief in the value of a product can affect your observation (placebo effect), trials are usually conducted in "double-blind" manner: that is, not only are the patients unaware when they are receiving a placebo, the doctors are unaware too.

Without a placebo group to compare against, it is not possible to know whether the product itself had any effect. Too many other things can cause variations in results affecting HP or temperature!

I believe in & use synthetic oils, but I only believe controlled studies, not individual's stories! If I did I'd be wearing garlic around my neck and loading silver bullets for the next wave of "Walking Dead! Amsoil is a religion to many! I'd buy the cheapest 100% synthetic and not believe anything but controlled studies.... and there aren't many of them! I think you will find there are two types of synthetic oils and the best one isn't tremendously better than the other. Also oil can still lubricate well while being contaminated with elements bad for an engine because it has been left in an engine too long. I use synthetics, but I don't leave them in an engine for more than 10K miles! I use them for their ability to withstand higher heat under stress!

I guess everyone has to do what makes sense to them, but remember: Fishing lures don't have to catch fish! They just have to catch fisherman! Auto products are the same!

Depend on controlled tests, not beer stories!

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Old 04-21-2014, 11:40 PM   #25
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The Royal Purple that is in Wal Marts and other stores is regular RP. When it has three big letters saying HPS that is the good stuff with zinc and phosphorus and its film strength is 5 times stronger than Mobil 1. Running anything other than 5-20 in a variable cam time engine is wrong. Royal Purple HPS is the best oil you can put in your car.
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Old 04-21-2014, 11:43 PM   #26
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Trackguys.com did a third party article on Royal Purple. I use the Amsoil filter because no other filter comes close.
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Old 04-22-2014, 12:09 AM   #27
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People using the film strength argument are actually debating with dated information and lack an understanding of modern oils and engine needs. Film strength is a measurement for extreme pressure, which modern engines no longer deal with. It's actually a characteristic needed in gearing, not engines. This is actually achieved through an additive. Companies like Mobile One leave it out of their oils for two reasons 1. It's no longer needed 2. It causes corrosion. Companies like Amsoil, Royal Purple etc, use it so that they can brag about their film strength with a dated Timken load test and market their highly over priced product.
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Old 04-23-2014, 02:08 PM   #28
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The Royal Purple that is in Wal Marts and other stores is regular RP. When it has three big letters saying HPS that is the good stuff with zinc and phosphorus and its film strength is 5 times stronger than Mobil 1. Running anything other than 5-20 in a variable cam time engine is wrong. Royal Purple HPS is the best oil you can put in your car.
Zinc and phosphorus only useful for old iron engines with high spring pressure valve trains as in resto-mod classic cars! Screws up Catalytic converters!
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Old 04-25-2014, 01:30 PM   #29
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Zinc and phosphorus only useful for old iron engines with high spring pressure valve trains as in resto-mod classic cars! Screws up Catalytic converters!
This is similar to what I was saying earlier. Their testing no longer applies to modern engines. It's all smoke and mirrors for people that don't know much about oil
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Old 04-25-2014, 05:17 PM   #30
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Never dreamed that this thread would still be alive after almost two years. Wish I could remember what show I saw that RP test on. Needless to say, I would guess you would see similar results with any synthetics.
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Old 05-20-2014, 05:24 PM   #31
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reguardless of the so called cheap rp oil! I been running rp from orielleys for 62000 miles. thats how long my gto has been cammed. Not one hiccup, It has been turning 6900 rpm every time i take it out. still burn's no oil, or leaks oil. my car has 125000 miles on it now. I have lost 10 rwhp and 9 rwtq in 62000 miles. never been retuned since either. i run my oil 4000 miles and change it. i use the rp oil filter.
If the cheap rp oil was a bad oil, i really think my ls1 would be showing sign's of bad oil by now. Cheaper oil. not by me!!!!
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Old 05-27-2014, 06:00 PM   #32
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reguardless of the so called cheap rp oil! I been running rp from orielleys for 62000 miles. thats how long my gto has been cammed. Not one hiccup, It has been turning 6900 rpm every time i take it out. still burn's no oil, or leaks oil. my car has 125000 miles on it now. I have lost 10 rwhp and 9 rwtq in 62000 miles. never been retuned since either. i run my oil 4000 miles and change it. i use the rp oil filter.
If the cheap rp oil was a bad oil, i really think my ls1 would be showing sign's of bad oil by now. Cheaper oil. not by me!!!!
So your evidence of proof of an oil functioning is that your engine hasn't broken. What about the evidence of people who use the cheapest oil they can find and Fram oil filters going 300,000 miles on their engine?

There is no evidence Royal Purple is better than other oils, if it were the same price as high quality oil then I'd say sure, use it. But since they want a premium for their oil no way.
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Old 05-27-2014, 07:56 PM   #33
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So your evidence of proof of an oil functioning is that your engine hasn't broken. What about the evidence of people who use the cheapest oil they can find and Fram oil filters going 300,000 miles on their engine?

There is no evidence Royal Purple is better than other oils, if it were the same price as high quality oil then I'd say sure, use it. But since they want a premium for their oil no way.
This.
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Old 05-29-2014, 07:09 PM   #34
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The Royal Purple that is in Wal Marts and other stores is regular RP. When it has three big letters saying HPS that is the good stuff with zinc and phosphorus and its film strength is 5 times stronger than Mobil 1. Running anything other than 5-20 in a variable cam time engine is wrong. Royal Purple HPS is the best oil you can put in your car.
Really? I run royal purple HPS 10w30 here in sunny florida and it loves the stuff. 5w20 will make more power and get better gas mileage, but your motor will not last as long. I'm still amazed that people are running 5w20 in their new coyote 5.0, while anyone with the track pack is running 5w50, same motor, variable cam time engine. That fact makes your statement kind of silly.
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Old 05-29-2014, 07:11 PM   #35
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Originally Posted by Troponin View Post
People using the film strength argument are actually debating with dated information and lack an understanding of modern oils and engine needs. Film strength is a measurement for extreme pressure, which modern engines no longer deal with. It's actually a characteristic needed in gearing, not engines. This is actually achieved through an additive. Companies like Mobile One leave it out of their oils for two reasons 1. It's no longer needed 2. It causes corrosion. Companies like Amsoil, Royal Purple etc, use it so that they can brag about their film strength with a dated Timken load test and market their highly over priced product.
Tell that to my rod bearings. Bearings in your motor are absolutely under extreme pressure, otherwise you could just use baby oil. Zinc and phos are still needed in modern engines, why else would oil manufacturers be adding other anti-wear additives to try and make up for the lack of zinc/phos, which the epa makes them take out to get the latest api rating. Nothing works as well as zinc/phos and they know it.
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Old 05-30-2014, 06:36 PM   #36
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So your evidence of proof of an oil functioning is that your engine hasn't broken. What about the evidence of people who use the cheapest oil they can find and Fram oil filters going 300,000 miles on their engine?

There is no evidence Royal Purple is better than other oils, if it were the same price as high quality oil then I'd say sure, use it. But since they want a premium for their oil no way.
Exactly! I have a Toyota Avalon with 340,000. miles on standard oil with regular oil changes & changing the filter every other oil change. It has had no work except brakes, shocks and timing belt. It runs great and gets great mileage. So much for the magical, mystery oils.

My belief is that synthetic oils give an extra tolerance to high temperatures which is valuable to tow vehicles and vehicles pushed hard. You can run them "at least" twice as long which is a convenience. Amsoil is sold in sales pyramids like women sell beauty products and Shakely household products.

I also am not convinced that running synthetics for extremely long periods makes sense. Where do all the pollutants go created in an engine that get past the rings. Running synthetics 30-40K miles seems like asking for trouble no matter what the manufacturers oil tests say! In a transmission, maybe! I guess we could take a oil used 30K miles and drop a nail in it as see how it looks a month later!!!!! (Smile)

In my "Beater" transportation cars I use Walmart Labelled 2000 Tech 100% Synthetic. It's pretty cheap for a synthetic and it seems to be working OK!

In reality, any "real, non bought off" scientist will tell you that it is impossible to tell about these products without highly controlled longitudinal tests which are extremely expensive to do and are rarely if ever done. There are too many variables to no for sure what causes engine wear and failure! I suspect the guarantees of products like Mobil 1 Extended Service are based on "you paying more up front" and Mobil rarely honoring the guarantee as related to the extra charge made.

I build Classic Cars like C1 Corvettes and 55-57 Chevy's. Those old engines need a break in oil with zinc and phosphorus to protect the cam, etc. when first run, but the additives in break in oils for oil iron cars supposedly mess up catalytic convertors in newer cars. Beware!

I have a 30 year guarantee on the roofs on three houses I own, but not one of the roofers is still in business!

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It's the principle in law that a person who buys something is responsible for making sure that it is in good condition, works properly, etc. or the claims make sense! Ever see fast food that looks like what is shown on TV? Caveat Emptor... Dude... when buying oils, engine additives and fishing lures! (Smile)
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Old 05-30-2014, 06:36 PM
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