Is Royal Purple better than Amsoil? Let's find out!

  • Published on: 04 March 2019
  • Is Royal Purple's full synthetic 5W-30 motor better than Amsoil's 100% synthetic 5W-30 motor oil? In this video both products go head to head in several tests. Both Amsoil and Royal Purple are very high quality synthetic motor oils. I bought both of these products using my own money. I am not sponsored by Amsoil or Royal Purple, and I do not sell Amsoil or Royal Purple products. The testing methods outlined in this video are my own and not performed using expensive oil lab testing equipment or following the ASTM, SAE or API testing standards. The three tests outlined in the video include tests for viscosity at varying temperatures, film strength, and evaporative testing. In my opinion, the testing approaches used in this video provide consumers with valuable information on choosing the right motor oil for their specific application. Hope you enjoy the rest of the video and thank you very much for supporting the channel by watching the commercials and through Patreon support.

    This video is only for entertainment purposes. If you rely on the information portrayed in this video, you assume the responsibility for the results. Project Farm LLC
  • Runtime : 11:32
  • Seafoam oil crankcase sea foam lucas marvel mystery oil marvels marvel mystery oil engine Sea foam does seafoam work engine rebuild carbon amsoil synthetic jb weld weld project farm royal purple royal purple vs amsoil royal purple oil review royal purple synthetic oil amsoil vs royal purple amsoil review 100 synthetic vs fully synthetic 100 synthetic motor oil 100 synthetic oil mobil 1 mobile 1 amazon basics amazonbasics viscosity evaporative loss


  • NinjaSpecter7
    NinjaSpecter7   3 hours ago

    Royal purpose has performance additives for more horse power. You didn’t test for that.

  • Randy Rougeau
    Randy Rougeau   3 hours ago

    Again thank you brother for all your time, effort and money you put into these tests,, they certainly are appreciated, I think the tests you conduct or down to earth, out of climate controlled corporate laboratory, real world results,, keep up the good work man!!!

    NYPANAMA   19 hours ago

    Can you tell me if you ever tested Amsoil, vs Mobil 1?

  • Antonio Warner
    Antonio Warner   19 hours ago

    “No oil was spilled in the making of this video”

  • Robo Jimbo
    Robo Jimbo   22 hours ago

    Do a Pennzoil 5w30 8$ a quart VS. dollar store brand 5w30gen 2 rated oils

  • David Collis
    David Collis   1 days ago

    My '95 Chevy C1500 idled smoothly except for the occasional hiccup with Royal Purple. I put in Mobil 1 extended performance and after about 200 miles the engine idled so smooth I had to look at the tachometer to see if it was still running. I am not impressed with Royal Purple. Iv'e used Amsoil in the past and it is really good oil, just a little hard to find sometimes. Thank You for the video Sir.

  • Woland
    Woland   1 days ago

    Is amsoil good oil? Maybe. But I did not have a chance to find out because they did not send my order but did not forget to charge credit card. Their dealers are just as user friendly - one simply did not show up for the appointment, another one quoted $12/qu a few days before he quoted $17. The third sent me to a local chevy (?) dealer because - as he explained - he hates doing business with assholes [amsoil]. I'm done trying. I've driven millions of miles without overpriced jump-through-the-hoops royalty, and I'm sure as hell will drive millions more without it.

  • Kyle Mutschler
    Kyle Mutschler   1 days ago

    Have you done any testing with Schaeffer oil? I'd like to see that. It's very popular here in the midwest

  • MattNic1
    MattNic1   2 days ago

    Try driven oil LS30 vs amsoil. Different oil for high performance engines

  • Manny Lumbres
    Manny Lumbres   2 days ago

    Just changed my oil and used Royal Purple for the first time. It was on sale for $30 for 5 qts and a free premium synthetic filter. I was pretty happy until I saw this. Should've stuck with the Pennzoil Ultra Platinum that I regularly use.

  • stephen e
    stephen e   3 days ago

    Regardless of what you use, a modern engine will last a long long time with regular oil changes. Now, if you're talking drag racing, that's a different story.

  • American Capitolist
    American Capitolist   3 days ago

    Also as a curiosity, use strait bleach on one of these tests. Bet some folls would be amazed at the results.

  • American Capitolist
    American Capitolist   3 days ago

    One request I would like to make is to take 7 grams of tungsten disulphide .06 micron and add it to am oil like amsoil conventional and synthetic in these same tests.

  • Lake City Mortgage
    Lake City Mortgage   3 days ago

    Can you do a similar test for motorcycle oil used for a snowbike application? Cold weather operating conditions.

  • Omer Zafar
    Omer Zafar   4 days ago

    Glad this confirms what I researched. Use Amsoil Signature Series every 3k miles for my turbo frs, no complaints. Track temp usually doesn’t go above 250ish

  • Adam Bass
    Adam Bass   4 days ago

    Have you ever tested Shaeffer oil? Love the video's

  • Joshua Guzman
    Joshua Guzman   4 days ago

    I came across this video randomly, but I'm happy I came across it,this video was very helpful to my knowledge, I thought royal purple was going to take the win but with all the info I was given I'll be buying amsoil, thank you for your time to make the video,I wouldn't of had the patience to move the coffee pots every 5min for 2 hours lol.

  • John Barkelew
    John Barkelew   4 days ago

    like to see mobile one and royal purple in a show down thanks

  • Luis-Cipher Mstar
    Luis-Cipher Mstar   4 days ago

    Just a quick observation here and please correct me if I'm here:Amsoil is top notch, but why test the Amsoil Signature series vs the base Royal Purple that is not much better than regular Mobil 1 Syn? Since the new company bought out RP, the base oil has none of the original additives that made it so good and competitive. Many of us have complained about them removing the additives and adding it to higher tiered RP oil for insane prices. Use the top tier royal Purple with Synerlec like the RP HPS. and Royal Purple XPR. Seen this in another test as well by another "oil guy" and he was called out for this. TBH though, you won't go wrong with either one of the oils as long as it's the top tier stuff. Love the presentation though and keep up the good work.

  • Gavin Esquivel
    Gavin Esquivel   5 days ago

    Hey project farm you gotta do a video on atf and manual transmission fluid

  • Marcus Ambrester
    Marcus Ambrester   5 days ago

    I totally geek out on your videos! Thanks for doing such good testing!

  • T Simmons
    T Simmons   5 days ago

    Would like to red line and certified labs oil against these 2 as well.

  • Josh Patterson
    Josh Patterson   5 days ago

    Unless you are living in the Antarctic what was the purpose of the Freeze test ? I use RP in my mustang its all I ever use Oil, trans, and rear diff

  • Performance Motoring

    I am an AMSOIL distributor/dealer and I have always been a proud supporter of AMSOIL. I am glad you did this video it proved what I have been telling people for years. If anyone is interested in more information they can reach reach me at and I will gladly answer any questions they may have.

  • Felix Rios
    Felix Rios   6 days ago

    Too many fkn ads. Couldn't watch it all

  • Jorge C
    Jorge C   6 days ago

    Mobil 1 Extended Performance Vs Mobil 1 Annual ProtectionThat’s one I would love to see! I wonder which one protects better and better on cold starts

  • Franco Barrera
    Franco Barrera   6 days ago

    Amsoil full synthetic is awesome. I used it for the first time when I drove my car from Texas to Michigan. 1500 mile trip. The oil was pretty clean and it didn't burn any oil. I normally use Mobil 1 full synthetic and amsoil outperformed it. I've also used Royal Purple, and Amsoil was better than that as well.

  • Booty Hole Man
    Booty Hole Man   6 days ago

    If you're already dropping 3x $ on royal purple, you might as well drop a few more $ and get the best, Amsoil!

  • Lovenpain
    Lovenpain   6 days ago

    What about amsoil vs Mobil one?

  • Jason Madden
    Jason Madden   6 days ago

    How does rural King's full synthetic oil fare against other brands

  • Krankie V
    Krankie V   6 days ago

    I changed oil in a friend's vehicle today with Mobil Super Synthetic. It only cost $1 more to use this than it would have cost to use a conventional oil. I would like to see how Mobil Super Synthetic compares to standard Mobil 1 Synthetic. I'm curious to see why it costs so much less.

  • Makaio Prescott
    Makaio Prescott   6 days ago

    Could you do tests on the Royal Purple HPS line? I've used that oil in my vehicles, and it's great. I'm just curious to see what it looks like through your tests.

  • Michael Lamon
    Michael Lamon   6 days ago

    Idk why I’m here but I’m really glad I am.

  • Darren Ditmar
    Darren Ditmar   6 days ago

    I would love to see a comparison of Harley Davidson brand oil to a competitor