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  • #61
    Re: Something is wrong with this picture

    2 questions.

    Which AMS oil is better than Royal Purple? Signature?

    I pay about $45-$50 for a 5 quart bottle of 10w-30 Royal purple. Sometimes my parts store has a deal that for about $55-$60 you can get Royal Purple and a K&N oil filter.

    Does AMS have a 5 quart bottle?

    Comment


    • #62
      Re: Something is wrong with this picture

      Originally posted by nwilson44 View Post
      2 questions.



      I pay about $45-$50 for a 5 quart bottle of 10w-30 Royal purple. Sometimes my parts store has a deal that for about $55-$60 you can get Royal Purple and a K&N oil filter.

      Does AMS have a 5 quart bottle?
      they don't have 5 quart bottles no. They sell Gallon bottles which is about 4 quarts and that is available for almost everything besides the OE oil.

      Which AMS oil is better than Royal Purple? Signature?
      Again, a bit of a loaded question. If you are go by test data, all of our oils test better than Royal Purple. I personally think that the signature series is the best we carry that can be run on the street, but even our cheapest OE synthetic oil scores better than Royal purple on all tests.

      Here, AMS's cheapest OE oil vs RP for 10W30...besides out scoring them on 4-ball wear test, see below as I have tried to take the important info to look for out.

      AMS

      Pour point:-40*F
      Viscosity index:145

      Royal purple

      Pour point: ?
      Viscosity index: 141

      I don't care much for flash point/fire point numbers, 450-480*F is high enough and both AMS/RP are 1-2* apart.

      Pour point is important if you want to use the oil year round. This number tells you at what point your oil will not move if you were to put it on an inclined surface for approximately 5 seconds or so. So basically, past this point, your oil is going to need to warm up before it can efficiently lubricate your parts.

      I haven't found a Pour point for RP, they haven't listed it in their specs, in fact many manufacturers don't. I don't really think you have to be overly worried about this number though unless you live in a real cold climate, since you're in Texas, I probably wouldn't worry about that number at all.

      Viscosity index measures how thick an oil is vs how much it changes with temperature. The higher the number is, means the less change there is and the essentially the better the protection your motor has, especially at higher rpm.


      In case you want to view the info for yourself, here is a link to the 10w30 OE (cheapest synthetic oil) we carry, which still rates better than Royal Purple does.

      http://www.amsoil.com/shop/by-produc...il/?zo=1907169

      And here is the spec sheet for Royal purple, compare the specs on page 2 of the RP document, under gasoline motors and 10w30 oil

      http://www.ro-quip.com/Technical_Doc...r%20Oil_ps.pdf

      2002 SOM Z28 Camaro - 12.9 @ 104 mph
      1996 3800 Camaro - 13.43 @ 100.77 mph


      Project Cars | How To Guides | Scratch Repair | Synthetic Oil

      Comment


      • #63
        Re: Something is wrong with this picture

        Originally posted by LETZRIDE View Post
        they don't have 5 quart bottles no. They sell Gallon bottles which is about 4 quarts and that is available for almost everything besides the OE oil.



        Again, a bit of a loaded question. If you are go by test data, all of our oils test better than Royal Purple. I personally think that the signature series is the best we carry that can be run on the street, but even our cheapest OE synthetic oil scores better than Royal purple on all tests.

        Here, AMS's cheapest OE oil vs RP for 10W30...besides out scoring them on 4-ball wear test, see below as I have tried to take the important info to look for out.

        AMS

        Pour point:-40*F
        Viscosity index:145

        Royal purple

        Pour point: ?
        Viscosity index: 141

        I don't care much for flash point/fire point numbers, 450-480*F is high enough and both AMS/RP are 1-2* apart.

        Pour point is important if you want to use the oil year round. This number tells you at what point your oil will not move if you were to put it on an inclined surface for approximately 5 seconds or so. So basically, past this point, your oil is going to need to warm up before it can efficiently lubricate your parts.

        I haven't found a Pour point for RP, they haven't listed it in their specs, in fact many manufacturers don't. I don't really think you have to be overly worried about this number though unless you live in a real cold climate, since you're in Texas, I probably wouldn't worry about that number at all.

        Viscosity index measures how thick an oil is vs how much it changes with temperature. The higher the number is, means the less change there is and the essentially the better the protection your motor has, especially at higher rpm.


        In case you want to view the info for yourself, here is a link to the 10w30 OE (cheapest synthetic oil) we carry, which still rates better than Royal Purple does.

        http://www.amsoil.com/shop/by-produc...il/?zo=1907169

        And here is the spec sheet for Royal purple, compare the specs on page 2 of the RP document, under gasoline motors and 10w30 oil

        http://www.ro-quip.com/Technical_Doc...r%20Oil_ps.pdf




        Hmm makes sense. How big of a difference is 141- 145 viscosity index?

        Comment


        • #64
          Re: Something is wrong with this picture

          Originally posted by nwilson44 View Post
          Hmm makes sense. How big of a difference is 141- 145 viscosity index?
          I don't know how to really explain it in real world differences lol. All I know and can explain is that the higher the number in the index the better, as the lower the number is it means that the oil thickens more when it cools and thins more when it gets hotter... how much of a difference each point makes I can't tell ya.

          What I can tell you though is that they group the oils into different categories:

          Group IV oils usually have a viscosity index of 150 or higher

          While the bottom end Group I and II petroleum based oils (non synthetic) have less than a 140 index.

          So basically, AMS OE, and RP are a middle of the pack oil, while AMS does have the edge on RP

          The signature series oil that I like and use, has a Viscosity index of 157, which places it in the highest category of Group IV oils
          Last edited by LETZRIDE; 03-30-2013, 07:09 PM.

          2002 SOM Z28 Camaro - 12.9 @ 104 mph
          1996 3800 Camaro - 13.43 @ 100.77 mph


          Project Cars | How To Guides | Scratch Repair | Synthetic Oil

          Comment


          • #65
            Re: Something is wrong with this picture

            Originally posted by LETZRIDE View Post
            I don't know how to really explain it in real world differences lol. All I know and can explain is that the higher the number in the index the better, as the lower the number is it means that the oil thickens more when it cools and thins more when it gets hotter... how much of a difference each point makes I can't tell ya.

            What I can tell you though is that they group the oils into different categories:

            Group IV oils usually have a viscosity index of 150 or higher

            While the bottom end Group I and II petroleum based oils (non synthetic) have less than a 140 index.

            So basically, AMS OE, and RP are a middle of the pack oil, while AMS does have the edge on RP

            The signature series oil that I like and use, has a Viscosity index of 157, which places it in the highest category of Group IV oils
            Nice. I like that. I am still going to do some research but that is good information, thanks!

            Comment

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