Pros/Cons Royal Purple
Thread Starter
Teching In
Joined: Mar 2015
Posts: 48
Likes: 0
Pros/Cons Royal Purple Hey guys just wondering if should switch to Royal purple if not what to switch too. Got the car handed down from an unfortunate death and want to switch the oil cuz i dont know what was in it.
You will hear a lot of opinions but I just use Mobil 1 5w30 and you can find it anywhere that sells oil..
Royal Purple is very expensive and can be hard to get at times.
Honestly pretty much any name brand oil will be fine.
Personally I use Castrol Syntec 0w40 which is the "European Formula" made in Germany. It can be found at most parts stores and Wal-Mart here and when it's in an oil change deal is fairly cheap ($32-35 with a good filter and 5 qts).
Honestly pretty much any name brand oil will be fine.
Personally I use Castrol Syntec 0w40 which is the "European Formula" made in Germany. It can be found at most parts stores and Wal-Mart here and when it's in an oil change deal is fairly cheap ($32-35 with a good filter and 5 qts).
TECH Addict
Joined: Jul 2013
Posts: 2,189
Likes: 123
From: Portland, Oregon
Royal Purple is just a high end synthetic... Just like every other high end synthetic.
It's biggest downfall is that it isn't free.
I used Mobil 1 in my Cadillac for a couple reasons:
1) it's what the general recommends,
2) the LY7 high feature V6 went through a lot of oil (even with a drilled pcv tube and a rx catch can), so I needed something that I could find everywhere.
A writer for guns and ammo magazine picks his guns based on whether or not the ammunition can be bought anywhere. He calls it the "Two-dot Test" because of a tiny town in Montana, Two-dot. If you can find the ammo in the gas station/store/post office in a backwoods little town, then you can find it anywhere.
Mobil 1 passes the "Two-dot Test".
It's biggest downfall is that it isn't free.
I used Mobil 1 in my Cadillac for a couple reasons:
1) it's what the general recommends,
2) the LY7 high feature V6 went through a lot of oil (even with a drilled pcv tube and a rx catch can), so I needed something that I could find everywhere.
A writer for guns and ammo magazine picks his guns based on whether or not the ammunition can be bought anywhere. He calls it the "Two-dot Test" because of a tiny town in Montana, Two-dot. If you can find the ammo in the gas station/store/post office in a backwoods little town, then you can find it anywhere.
Mobil 1 passes the "Two-dot Test".
Used to use M1 but it burned off too fast, usually lost at least 1 qt between changes.
RP doesn't burn in my cars and its local to me so I can buy in bulk.
Castrol makes good quality oil, especially the "euro" line of full synthetic.
RP doesn't burn in my cars and its local to me so I can buy in bulk.
Castrol makes good quality oil, especially the "euro" line of full synthetic.
Trending Topics
Royal Purple is a good oil. If you have a reliable vender then there's really no pressing reason to not use it. Same goes for Mobil 1 and Castro Syntec.
It just so happens that I use Penzoil Platnum --->> http://www.walmart.com/ip/14958690?reviews_limit=7& .
KW
It just so happens that I use Penzoil Platnum --->> http://www.walmart.com/ip/14958690?reviews_limit=7& .
KW
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
penzoil 5w40 ultra
just pulled a 160k mile motor out of one of the cars and it still looks damn near brand new inside, and that was with quite a few 10k mile oil changes, bearings looked perfect also.
just pulled a 160k mile motor out of one of the cars and it still looks damn near brand new inside, and that was with quite a few 10k mile oil changes, bearings looked perfect also.
Royal Purple is just a high end synthetic... Just like every other high end synthetic.
It's biggest downfall is that it isn't free.
I used Mobil 1 in my Cadillac for a couple reasons:
1) it's what the general recommends,
2) the LY7 high feature V6 went through a lot of oil (even with a drilled pcv tube and a rx catch can), so I needed something that I could find everywhere.
A writer for guns and ammo magazine picks his guns based on whether or not the ammunition can be bought anywhere. He calls it the "Two-dot Test" because of a tiny town in Montana, Two-dot. If you can find the ammo in the gas station/store/post office in a backwoods little town, then you can find it anywhere.
Mobil 1 passes the "Two-dot Test".
It's biggest downfall is that it isn't free.
I used Mobil 1 in my Cadillac for a couple reasons:
1) it's what the general recommends,
2) the LY7 high feature V6 went through a lot of oil (even with a drilled pcv tube and a rx catch can), so I needed something that I could find everywhere.
A writer for guns and ammo magazine picks his guns based on whether or not the ammunition can be bought anywhere. He calls it the "Two-dot Test" because of a tiny town in Montana, Two-dot. If you can find the ammo in the gas station/store/post office in a backwoods little town, then you can find it anywhere.
Mobil 1 passes the "Two-dot Test".
TECH Addict
Joined: Jul 2013
Posts: 2,189
Likes: 123
From: Portland, Oregon
Unless someone with a background in petroleum chemistry chimes in with some empirical data, this is all going to be opinion.
High quality synthetic oil is all pretty much the same. You could get 100 success stories for every manufacturer/brand, and for every success story, you could find someone ranting and raving about how bad that exact product sucks.
Use what you can find easily and afford. Or buy in bulk so you don't have to worry about where it's available.
High quality synthetic oil is all pretty much the same. You could get 100 success stories for every manufacturer/brand, and for every success story, you could find someone ranting and raving about how bad that exact product sucks.
Use what you can find easily and afford. Or buy in bulk so you don't have to worry about where it's available.
This, several years back their over the counter oil used to have the additive "synerlec" which is what make RP that exclusive oil you could get for 8 bucks a quart still rated API SL, but ever since they went mainstream and the EPA got on their case their over the counter oil's have been stripped of that additive package and now conform to API SN standards with the lower additive contents, making them no different they any other shelf brand full synthetic. Rotella T6 is the only brand left on store shelves that still conforms to a old standard and contains a higher additive package, API "SM", which is what I use mainly because its the cheapest full synthetic you can find as well and Shell's reputation for turbo diesel oil's is amazing. Subaru guys swear by this stuff as it's great in cars that are heavily abused. If you want the high end RP stuff you have to mail order it through amazon or get it at a "race shop" you wont find it in stores. When I used it it was great stuff, and I recently used their "purple ice" coolant additive and saw a significant drop in coolant temps. Was pleasantly surprised by that.
TECH Addict
Joined: Jul 2013
Posts: 2,189
Likes: 123
From: Portland, Oregon
I wish I had tried that rotella t6 in my Cadillac. I just ran around Google, hitting up different forums (vw, subi, dodge/cummings to name a few) to get a general qualitative opinion on it.
Wow.
Apparently even Bob the oil guy says the rotella t6 oil is better than royal purple, due to its shear resistance.
I don't know what oil shearing is, but I will Google it later. Probably something really simple like how long it will stretch when poured before it breaks free and forms a drop. But I will look into further.
PS. My phone tries to automatically "correct" the word rotella into foreplay. Lol.
Wow.
Apparently even Bob the oil guy says the rotella t6 oil is better than royal purple, due to its shear resistance.
I don't know what oil shearing is, but I will Google it later. Probably something really simple like how long it will stretch when poured before it breaks free and forms a drop. But I will look into further.
PS. My phone tries to automatically "correct" the word rotella into foreplay. Lol.
TECH Addict
Joined: Jul 2013
Posts: 2,189
Likes: 123
From: Portland, Oregon
Well, oil shearing is not as simple as I was thinking.
It's the oil's ability to hold up after being crushed... Essentially. In a perfect world, your crankshaft would never touch the rod bearings because of a layer of oil separating them. When the spark plug ignites a cylinder, throwing the piston towards the crank, the upper rod bearing squashes the layer of oil.
An oil with a higher shear point resists being squeezed out more than one with a lower shear point.
They test this by measuring the viscosity of the oil at a set temperature first. Then they pump it through a gigantic diesel fuel injector to really work the oil. And then they measure the viscosity again. The before and after values are compared, and some formula using the two measurements then gives you that oil's shear point.
Not sure if anyone cared for the explanation, but there you go.
And apparently rotella t6 has a more favorable shear point than royal purple.
It's the oil's ability to hold up after being crushed... Essentially. In a perfect world, your crankshaft would never touch the rod bearings because of a layer of oil separating them. When the spark plug ignites a cylinder, throwing the piston towards the crank, the upper rod bearing squashes the layer of oil.
An oil with a higher shear point resists being squeezed out more than one with a lower shear point.
They test this by measuring the viscosity of the oil at a set temperature first. Then they pump it through a gigantic diesel fuel injector to really work the oil. And then they measure the viscosity again. The before and after values are compared, and some formula using the two measurements then gives you that oil's shear point.
Not sure if anyone cared for the explanation, but there you go.
And apparently rotella t6 has a more favorable shear point than royal purple.
TECH Addict
Joined: Jul 2013
Posts: 2,189
Likes: 123
From: Portland, Oregon
Any of the oils with additives will gunk up your turbos if you have crappy leaking turbo seals. Just like the additives gunk up catalytic converters if your engine drinks oil.
But yes, any oil with a lot of additives will require you to check your turbo bearings regularly... Probably whenever you change your motor oil.
But yes, any oil with a lot of additives will require you to check your turbo bearings regularly... Probably whenever you change your motor oil.
On The Tree
iTrader: (1)
Joined: May 2015
Posts: 179
Likes: 4
From: Grew up in Charleston, SC live in Moncure, NC
I just read a very lengthy independent report on how well different oils protected against wear and Mobile 5w30 synthetic and Valvoline VR1 conventional was very high on the list of 150+ oils tested. Royal Purple was not near the top.
Teching In
Joined: Oct 2012
Posts: 17
Likes: 2
Please share report, I would like to see it my self.