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

  • Published: 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
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Comments • 14 957

  • ziiofswe
    ziiofswe  7 hours back

    Not gonna read 15k comments to see if it's been said already, but... I'm a bit negative to the simple fact that RP seems* to color their oil. It looks used when new, AND it's a lot more difficult to see if there's unwanted particles in the oil. The Amsoil oil was still somewhat transparent even after the heat test.

    * I say "seems" since I've never seen the brand in a store here in Sweden.

  • Mister Udik
    Mister Udik  8 hours back

    Amsoil good oil...but too expensive in my country

  • William Copeland Jr.
    William Copeland Jr.  10 hours back

    Hey Project Farm! Can we see a AMSOIL OE 5w-30 go head to head against Valvoline 5w-30?

  • Max Rextol
    Max Rextol  1 days back

    Please include other brands thats never been featured before like Rock Oil, Eneos, Petronas etc in your future video :)

  • Rob Games
    Rob Games  1 days back

    royal purple also makes a full synthetic 5w 30 you should try that

  • chris gonzalez
    chris gonzalez  2 days back

    Amsoil vs motul vs royal purple perhaps ?

  • Hellow
    Hellow  2 days back


  • Bob Atkins
    Bob Atkins  3 days back

    Great test - thank you! Sure would be great if you could perform an Amsoil vs. Valvoline Full synthetic test. I can't find a proper comparison test like yours of those two oils anywhere.

  • Mark Giles
    Mark Giles  4 days back

    Amsoil vs Motul please

  • Grant Gaudry
    Grant Gaudry  4 days back

    Let's see polaris oil vs amsoil atv oil thanks keep up the great content.

  • qwedsawsqwwwww
    qwedsawsqwwwww  4 days back

    Ams 😁

  • Carl Moyar
    Carl Moyar  5 days back

    That is not the Royal Purple HPS with the Synerlec additive. If it was, Amsoil would not have a chance!

    • Carl Moyar
      Carl Moyar  14 hours back

      Will you do a video/comparison using the Royal Purple HPS?

    • Project Farm
      Project Farm   5 days back

      Thank you for the feedback!

  • AngeredKabar
    AngeredKabar  5 days back

    I love that the gram scale is called the "GDEALER"

    • Morty
      Morty  11 hours back

      Project Farm I really want to run AMSOIL but it does not claim to meet or exceed dexos2 only 1. I have a 2014 Chevy Cruze 2.0 diesel and want only the best oil. What are your thoughts?

    • Project Farm
      Project Farm   5 days back

      Thank you for the feedback!

  • Jess Please.
    Jess Please.  5 days back

    You should do oil filter tests.

  • HaHaHaRich
    HaHaHaRich  5 days back

    Lucas oil next!

  • Cavan Keily
    Cavan Keily  6 days back

    Why did you use 2 different specifications of oil? It was a poor comparison. The amsoil specification is designed with lower viscosities and evaporation rates for light duty petrol, it's literally part of the specification requirement. The royal purple is primarily a diesel spec oil with higher viscosity. The specification limits of these 2 products MUST be different and the results reflected the requirements of each spec. Complete waste of time unless your going to test the same spec products together.

    • A Zeeshan
      A Zeeshan  6 days back

      Hi Please test Amsoil vs Liqui Moly (0w20)

    • Christofer Adkins
      Christofer Adkins  6 days back

      Could you do an oil test featuring Quaker state products and see how it compares to any of the other oils you've tested?

      • Project Farm
        Project Farm   6 days back

        Great suggestion. I tested QS in a more recent video

    • Eric Sundell
      Eric Sundell  7 days back

      Proof RP is overpriced trash, as I've said for years. After I switched to Amsoil products, I've never looked back.

    • wing 0
      wing 0  7 days back

      My tsx love amsoil and it runs like new

    • Lv Lee
      Lv Lee  1 weeks back

      Why 416.3 Amsoil, and 406.3 Royal Purple?

      • ItsDevlcon
        ItsDevlcon  1 weeks back

        Royal purple is good for people who warm their engines before drivingn

        • ItsDevlcon
          ItsDevlcon  1 weeks back

          @Project Farm love your videos tho lol so random always fun

        • ItsDevlcon
          ItsDevlcon  1 weeks back

          @Project Farm you dont want oil to move quickly when its warm you want it to be somewhere between thick and thin right lol

        • Project Farm
          Project Farm   1 weeks back

          Thank you for the feedback

      • D R
        D R  1 weeks back

        The proof is in the pudding

      • deeez00
        deeez00  1 weeks back

        20 years ago Royal Purple was the best of the best! Looks like there's a new top dawg in town!

      • Ejr
        Ejr  1 weeks back

        Amsoil it is !

      • Shadow Dahlke
        Shadow Dahlke  1 weeks back

        Should do a comparison between valvoline motorcraft and rotella 15w 40 non synthetic oils. This type of information is huge when it comes to injector failure in 6.0 powerstroke engines and itd be interesting to see why some big performance builders dislike rotella weather it's just their opinion or if theres actually to truth to it.

      • NinetySevenTill
        NinetySevenTill  1 weeks back

        MOTUL FTW

        • Reel-Lentless
          Reel-Lentless  1 weeks back

          How about a 15w-40 Diesel Engine Oil comparison test with synthetic and regular. Have to compare Delo and Rotella for sure.

        • Redwolf Rockwalls
          Redwolf Rockwalls  1 weeks back

          Can you do a test with legends oil vs other oil

        • Kiddomike
          Kiddomike  1 weeks back

          Video suggestion:

          Royal Purple HPS versus Amsoil Signature series Motor Oil (5w-30)

        • Thomas Leary
          Thomas Leary  1 weeks back

          For we who race, would you please compare DRIVEN race oil, MAXIMA race oil, and AMSOIL race oil please? Thank you.

        • Barney Mia
          Barney Mia  2 weeks back

          Hi, Great video. Do you think I want to use this oil in my car? Please help me.

          • KC9UDX
            KC9UDX  2 weeks back

            I have used Amsoil quite a bit over the years. Yeah, I expected it to be good. But not *that* good. Amazing video, yet again.

          • Charles Maines
            Charles Maines  2 weeks back

            I'm a Amsoil fan from my motocross days. Riding a VN 2000 now and could feel smoother shifting with using Amsoil rather than conventional oil.

            • joemoneytaker1
              joemoneytaker1  2 weeks back

              Fantastic video sir, thank you 👍

            • Christian Arcos
              Christian Arcos  2 weeks back

              Do liquid molly vs amsoil

            • James A
              James A  2 weeks back

              Dammit, I'm a believer

              • Big Dago
                Big Dago  2 weeks back

                I wanted to see Schaefer tested and found your other tests. Schaefer vs Mobil 1 ended with the tournament brackets and I've heard you mention in some videos. Is there an existing or easy way to keep track of that bracket with red line tiers you had ? Thanks !

                • Joe B.
                  Joe B.  2 weeks back

                  Rotella vs Amsoil

                • Stelios Antoniou
                  Stelios Antoniou  2 weeks back

                  Have you considered testing polytron mtc?? It makes some huge and bald sounding claims

                • Keith Fendley
                  Keith Fendley  2 weeks back

                  Seen a few videos in the past and really enjoyed them. I subscribed today based off this video because I've been hearing different things about these two oils. I've heard more negatives about RP than Amsoil. Besides Honda OEM oil, as a secondary, I'll be running Amsoil for sure. Just picked up an '11 Civic Si with the K20z3. It's a high revving engine so it needs the best protection. Keep up the great work and experiments! 👍🤘

                • NorthWestSurvival
                  NorthWestSurvival  2 weeks back

                  I want a oil that sticks to parts for dry start ups . Dry start ups is were most wear comes from and royal purple is the winner in that department. Most of these tests don't tell me anything but are interesting and thanks for them..

                • B Stein
                  B Stein  2 weeks back

                  Hey Todd(Project Farm) love your videos. Would like to see an oil test against T4 rotella and Mobil Delvac 1300 Super. Please please!!

                  • B Stein
                    B Stein  2 weeks back

                    Project Farm you’re welcome! I have a diesel and besides the constant battle on forums between amsoil and rotella the delvac gets praised too so i would be curious to see how it fairs against a comparable product such as t4

                  • Project Farm
                    Project Farm   2 weeks back

                    Thank you

                • antoniota 1
                  antoniota 1  2 weeks back

                  nice video thanks man!!

                • Rick Taylor
                  Rick Taylor  2 weeks back

                  I wouldn't use Royal Purple in a wore out lawnmower.....purple oil ? Really ?

                  • tjcoons450
                    tjcoons450  2 weeks back

                    @Rick Taylor that sounds like a line of bullshit bud

                  • Rick Taylor
                    Rick Taylor  2 weeks back

                    @tjcoons450 I used to work for Asplundh tree company. We had 86 trucks in our region, they all had 496 ci.- 8.1 liter engines, We used Mobile 5000 10 W 30. 
                    The company switched to Royal Purple, all 86 trucks / engines started using 2-3 quarts of oil per day. 27 engines locked down completely. Royal Purple ruined our engines. 
                    Eventually, we replaced all 86 engines, it cost over 1.5 million dollars. None of the engines lasted over 3000 miles, when we started using Royal Purple.
                    We used the rest of the Royal Purple for chainsaw bar oil. The purple dye is a gimmick for dummies.

                  • tjcoons450
                    tjcoons450  2 weeks back

                    Its actually really good oil, it has a lot of detergents for engine cleaning a lot like mobil 1 extended performance.

                • Robert York
                  Robert York  2 weeks back

                  I would love to see castrol edge extended performance 5W30 it's a 20000 mile oil I would love to see that oil tested

                • EvilJ069
                  EvilJ069  2 weeks back

                  Maybe I missed it, have you tried testing Motul?

                • David Stanley
                  David Stanley  2 weeks back

                  buy cheap oil change often