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Old 07-24-2013, 09:14 PM   #1
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amsoil vs royal purple

What's your guys/gals thoughts on these oils? I have an independent dealer for amsoil and he's really selling me on it but then I hear everyone on here running royal purple and bragging about it lol so please tell me what u think and or about your experiences with both oils

Thanks!!!
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Old 07-24-2013, 10:15 PM   #2
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I like royal purple myself and it has a really good reputation....all my fluids are royal purple
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Old 07-24-2013, 10:29 PM   #3
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I like royal purple myself and it has a really good reputation....all my fluids are royal purple
Do u know if your engine or tranny run any cooler than it normally did with RP?
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Old 07-24-2013, 10:33 PM   #4
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Both are 100% fully synthetic oils and both are great. I Choose AMSOIL because it holds its original properties longer. Royal Purple in my case sheared faster.
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Old 07-24-2013, 10:33 PM   #5
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Definitely royal purple. It's much more reliable and has a way better reputation.
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Old 07-24-2013, 10:37 PM   #6
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Definitely royal purple. It's much more reliable and has a way better reputation.

Any claims to back up your findings?

Here is a study that was done just this past June.

http://www.amsoil.com/lit/g3115.pdf

While it is an AMSOIL document all tests were done by third party manufactures. I do not believe everything I read but I have blackstone lab tests from both royal purple and AMSOIL from my turbo IS300.

AMSOIL held its properties thousands of miles longer than Royal Purple.

Ever since Royal Purple went more commercial (IE: Sold in WALMART) the products they sell have went down slightly in quality from there old 2008 stock.
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Old 07-24-2013, 10:43 PM   #7
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Do u know if your engine or tranny run any cooler than it normally did with RP?
Honestly I haven't really checked....I use royal purple becouse I live right by the bonnivel salt flats were people come to break land speed records and all the drivers I talk to use royal purple....and these guys are driving cars that cost upwards of 200,000 so if its good for them it's good for me
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Old 07-25-2013, 07:43 AM   #8
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Amsoil is the better of the 2 and they are both a COMPLETE waste of money in a street car. Change your oil at good intervals with regular old Motorcraft blend and you'll never have an issue. Not unless you are tracking the car all the time and running real high RPM for extended timeframes. My oil changes cost me $20 a pop buying my oil and a Motorcraft filter from wal mart. I honestly get a good chuckle out of you guys dropping $75 on 6 qts of oil and whatever on a filter.
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Old 07-25-2013, 12:33 PM   #9
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I agree with scotty, I do run rp though. I think its a little unnecessary but I don't have to change it as often and filter will get two uses until changing it again.
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Old 07-25-2013, 12:41 PM   #10
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They are not a complete waste of money scotty. I can legitimately run AMSOIL 15k miles. It costs me $56 an oil change with preferred membership. For me it is just a time saver as I work a lot. I average 65+ hours a week.

I know its safe to 15k. Ive had Blackstone Labs run tests on it.
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Old 07-25-2013, 02:15 PM   #11
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I run Amsoil but still change it at 3k, looks as clean as the day I put it in! Overkill I know, but I plan to keep the car till im gone.

---------- Post added at 03:15 PM ---------- Previous post was at 03:14 PM ----------

Anyone have side by side specs?
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Old 07-25-2013, 02:57 PM   #12
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That is absolute overkill....
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Old 07-25-2013, 04:21 PM   #13
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I have tried Royal Purple and AMSOIL. What a difference. royal purple feels like water compared to AMSOIL.And motor takes less oil.Change oil every 10.000km.
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Old 07-25-2013, 04:22 PM   #14
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I change mine every 3k with either the Motorcraft or Super Tech and it looks nice and clean. Takes 20 minutes from start to finish with ramps and I know it was done right and not by some yahoo kid at Jiffy Lube while costing $20. Hell I let my Expy go 6k between changes with the same oil and its totally fine.

I mean whatever, I still think its overkill but its not my money and peace of mind is priceless honestly. If I had a GT500 or a Boss or something bought from brand new I might use Amsoil too...
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Old 07-25-2013, 05:58 PM   #15
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Awesome input everyone I really appreciate it! Doesn't amsoil has a 25k or 1 year oil? I'm thinking of doing it cuz I work a ton and have no intentions of taking it somewhere I think ill be going with amsoil just because it seams to have a better review than RP and I work with an independent dealer who I can get a good price for it
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Old 07-25-2013, 08:27 PM   #16
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I ran Amsoil in my M3 and it was a great oil. I chose Royal Purple 5w-30 HPS in the mustang. Royal Purple has a great product that is readily available at several parts stores. I have just under 15k in my engine and good oil is just insurance. You also will find that a majority of your professional engine builders use Valvoline VR1 oil.
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Old 07-26-2013, 01:56 PM   #17
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I dont think I could run 10K plus on an oil change.
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Old 07-26-2013, 02:01 PM   #18
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RP is the only thing my stang gets. My 07 GT ran on that and now my 2013.
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Old 07-26-2013, 02:18 PM   #19
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I dont think I could run 10K plus on an oil change.
An oil analysis can tell you a lot a out your car and oil.
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Old 07-26-2013, 02:21 PM   #20
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Hit up the Bob is the Oil Guy site/forums for a wealth of knowledge on oils and intervals and everything.

I will continue to use Motorcraft or Super Tech oil on my current PI motor but when I build up my Teksid I might look at Amsoil again.
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Old 07-27-2013, 11:21 AM   #21
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Threw amsoil in the GT last night and I also used an additive made by amsoil to prepare for any kind of new oil and I was amazed by just what the additive did I coud see stamp markings for part numbers haha and oil w/ filter and the additive only costed me 60$ and won't have to chnge it again for 1 year
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Old 07-27-2013, 11:44 AM   #22
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I used to work on a race truck when amsoil came out. The truck picked up 8hp on the engine dyno from it. That said, I still run valvoline, I have 2 trucks with 300k+ that says its good enough. The key is to change it on a regular basis. Amsoil claims you can go 25k if you use their filters.
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Old 07-27-2013, 11:58 AM   #23
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I used their fillter for 25k and I used Valvoline b4 this and when I changed it out it broke down so much it looked like water! It wasn't a good sight lol
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Old 07-27-2013, 01:56 PM   #24
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I used their fillter for 25k and I used Valvoline b4 this and when I changed it out it broke down so much it looked like water! It wasn't a good sight lol
How do you know it broke down, did you have it tested? You can't go by looks.
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Old 07-27-2013, 02:05 PM   #25
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I should have took a pic or something and I am going off looks, only because it was pretty bad I haven't ever seen such watery oil just my opinion no tests were done just an observation
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Old 07-28-2013, 03:21 AM   #26
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The filters are good up to 25k and 15k severe service. Same with the signature series oil. Most of us fall into severe category.
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Old 07-28-2013, 04:05 AM   #27
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I always use Mobil1 full syn and no issue. It's 1/2 the price of the Amsoil or Royal Purple and prob almost as good.
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Old 07-28-2013, 10:15 AM   #28
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I always use Mobil1 full syn and no issue. It's 1/2 the price of the Amsoil or Royal Purple and prob almost as good.
At my local Wal Mart RP is only one or two dollars more per quart than M1.
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Old 07-28-2013, 10:18 AM   #29
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I always use Mobil1 full syn and no issue. It's 1/2 the price of the Amsoil or Royal Purple and prob almost as good.
It is not nearly as good but it is good enough for just about anything. You can spend $55 bucks for an AMSOIL oil change and it lasts up to 15k miles easily. So overall the yearly cost is lower.
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Old 07-28-2013, 10:36 AM   #30
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You guys running 15k miles on your oil changes ARE using a top quality filter like a WIX filter right? I will laugh at the first guy who says FRAM.
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Old 07-28-2013, 10:43 AM   #31
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You guys running 15k miles on your oil changes ARE using a top quality filter like a WIX filter right? I will laugh at the first guy who says FRAM.
Oh god... fram is the devil! I use the amsoil extended oil chage filters.
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Old 07-28-2013, 10:50 AM   #32
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Yeah the Amsoil filters are SUPPOSED to be good for 20k+ miles. They have been confirmed by multiple oil samples. You can definitely run 15k+ with an Amsoil change and Amsoil or WIX filter.
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Old 07-28-2013, 10:52 AM   #33
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RP oil & filter for me.
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Old 07-29-2013, 10:05 PM   #34
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It is not nearly as good but it is good enough for just about anything. You can spend $55 bucks for an AMSOIL oil change and it lasts up to 15k miles easily. So overall the yearly cost is lower.
I am in Florida. It's 11 pm and near 90• w/90% humidity. I can't see any oil lasting 15k miles in bumper to bumper traffic in these conditions. Got to change it every 3-5 k. Just wouldn't have any piece of mind any other way. I will look into RP and Amsoil for my first oil change in the new ride.
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Old 07-29-2013, 10:08 PM   #35
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Have an oil analysis done. It can tell you a lot.
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