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Royal Purple 5w20 Motor Oil

Item 45000
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      Review & Installation Video

      If you're looking for a modern synthetic oil for your stock or modified Mustang, the Royal Purple 5W-20 here might just be the most popular option currently on the site with well over 100 five star rated reviews. Now that 5W-20 weight will make it compatible with most newer Mustangs, including the recommended factory weight in the S550 cars and can be had for right around 8 bucks a quart. Now since oil changes are basically wrenching 101, the site is going to call this a one out of three wrenches on the old difficulty meter. About an hour or so to get everything knocked out. So this will be a relatively short one, guys, because it's oil and let's face it there's really not a ton to talk about outside of those manufacturer claims. So what do you say we break those down first? Now Royal Purple does state that their API licensed high-performance synthetic here is going to meet or exceed the standard set by dexos1 and ILSAC GF-5. Now the dexos was was originally a GM thing but it did usher in a new set of standards for high-quality modern synthetics which did include or mandate the use of high-quality ingredients, better anti-oxidant technology and with a higher mileage interval and lower viscosity when compared to other non-dexos oils on the market. Now that ILSAC rating, on the other hand, is gonna hold a little bit more weight in my opinion as it was started by a number of big manufacturers including Ford, GM, Chrysler and more to better define the standardization of lubricating parameters. Now the Royal Purple is going to meet and exceed the ILSAC GF-5 standard when it comes to providing high-temperature protection for both pistons and turbos, increase sludge protection or control, better fuel economy, better seal compatibility, and last but not least enhance protection against higher ethanol content fuels like E85. But aside from the enhanced wear protection we just talked about, Royal Purple is also going to claim increased fuel economy when running this oil due to the lower coefficient of friction that basically allows their slightly heavier 5W-30 to meet the fuel economy requirements of a 5W-20. So not gonna be night and day but it's something again they do claim. Royal Purple also features a unique patented ZDDP additive that will still offer the protection you've come to expect out of that traditional zinc and phosphorus mix but without some of the chemicals that can accelerate the wear and tear on your emissions components like your catalytic converters. But I do want to point out that the basic API oil that we have here is going to be essentially the entry level lubricant for Royal Purple as a brand or as a company. The next step up will be your HPS which is the high-performance street oil with that [inaudible 00:02:48] technology baked in entire levels of that ZDDP additive we just talked about. But if you really want the utmost in protection from Royal Purple, you should definitely check out their XPR race oil here on the site. It's gonna cost you more than double the price of the standard stuff we're talking about here but is claimed to be the best oil of choice for hardcore competition used. Now your oil change intervals with the standard Royal Purple here are gonna lie between that 5,000 to 10,000-mile mark and that's gonna be the case with a lot of today's modern synthetics as they really don't break down nearly as fast as those older conventional oils. As far as specific weight is concerned, well that's gonna be up to you guys because it will differ from engine to engine and application to application. But when in doubt, guys, it's really never a bad idea to follow what's recommended in your owner's manual. Now as far as your installation I guess is concerned in this case well, listen guys, oil changes are one of those standard automotive chores that most everybody should be familiar with. So you should know the deal, make sure you grab enough for your application along with a fresh filter and most importantly, make sure you dispose of that old oil properly. But in closing, if you want to go with one of the most popular oils on the site for your stock or modified Mustang, be sure to check out the Royal Purple 5W-20 right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Increases Horsepower
      • Improved Wear Protection
      • Fully Synthetic
      • Extends Oil Change Intervals
      • 5w20 Weight


      Protect Your Investment. The most effective way of ensuring long engine life in either a heavily modded racecar or daily driven 'Stang is regular oil changes. And there is no better oil available for your Pony than Royal Purple. Royal Purple is a full synthetic oil that contains a patented additive to reduce engine wear and protect your rings, cylinders, and bearings more than any other. It also sticks to your engine's internals after shutdown to protect your engine upon startup.

      Superior Performance. Unlike other oils, Royal Purple continues protecting your engine even at high temperatures, making it a great choice for every Mustang. It lubricates better regardless of temperature, ensuring your Mustang will run right whether you're stuck in a traffic jam or going for FTD (fastest time of the day). Many Mustang owners even report better throttle response or even horsepower gains with Royal Purple.

      Resists Breakdown. Royal Purple is more resistant to breakdown than other oils, meaning you can go longer on an oil change without worrying about engine damage.

      Application. This Royal Purple Oil is a 5w20 weight. Check your Mustang's oil cap or owner's manual for the correct weight for your engine.
      • I4 needs 6 quarts for a complete oil change.
      • V6 needs 5-6 quarts for a complete oil change.
      • V8 needs 5-8 quarts for a complete oil change.

      Please Note: If you are unsure how many quarts of oil you will need for a complete oil change, please refer to your vehicles owner manual or contact your local Ford dealer.

      Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

      MPN# 01520

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (100+)

      Write a Review

      Ratings Summary

      4.9 out of 5 overall rating from 100+ customers

      • February 25, 2020

        5 2013 V6 - sonny13

        Great Oil

        If you have a high performance engine this is a must have gives great protection from heat engine wear.

        Helpful (0)
      • January 31, 2020

        5 2015 GT - DavidW

        The best oil for you Mustang GT. 5.0

        Used 's Royal Purple 5w-20 from day one. Will never use nothing else. American Muscle has you covered. The price is right on point.

        Helpful (0)
      • October 30, 2019

        5 2003 GT - JoeM

        Great Product!

        I’ve been using royal purple oil 5w20 for awhile now, when I started I used Royal Purple HPS 5w20 and could really feel a difference in my vehicle performance. I have to say that the HPS version is kinda hard to find, but so far the high performance version has been doing the job. Would highly recommend this product.

        Helpful (2)
      • October 21, 2019

        5 2015 V6 - Rich

        Purple oil !!!

        I notice a smoother running engine... this is my second time around with this oil ... love it...

        Helpful (1)
      • October 13, 2019

        5 2003 V6 - Jamesp123

        Best oil you can buy.

        I own 2 mustang's and this is the only oil I would use. I recommend all Royal Purple products.

        Helpful (1)
      • July 05, 2019

        5 2015 GT - JohnC1788

        Great Product!!!

        Started using RoyalPurple and have love it ever since, with a slightly modded mustang I feel like this keeps my engine running strong with no problems at all.

        Helpful (1)
      • June 30, 2019

        5 2015 GT - MikeW


        we all know that the coyote take 8 quart of oil I found that AM was cheaper by 2 bucks a quart vs. my local parts place or Amazon

        Helpful (1)
      • May 03, 2019

        5 2015 GT - FiveOFabian99

        Royal Purple 5w20 Motor Oil

        Great product, makes the car drive smooth and used this oil about 3 times already never lets me down

        Helpful (1)
      • April 29, 2019

        5 2004 GT - jordan


        Royal purple really makes a big difference!!! The smell of it and everything u can feel a difference in horsepower not a big jump but something. Can definitely go longer without oil changes if needed to

        Helpful (2)
      • April 13, 2019

        5 2006 V6 - Vee

        Love it

        I love the Royal Purple. I am about to order another. It is time for my oil change.m :-) It is really great!

        Helpful (1)

      Questions & Answers (18 answers)

      5 Top Rated Questions

      How many miles can i go between oil changes with Royal purple oil? I have heard that you can run up to 7000 miles between oil changes with Royal Purple. Is this true? If not what is recommended? Also, right now i am running 5w-20 Castrol GTX High Mileage in my '03 GT with 123K miles, should i move up to another weight and viscosity considering this is high mileage?

      • Its possible with some of the newer oil designs to run 5k miles between oil changes. However, with any car that has a few miles on it staying closer to the 3k miles range will only benefit you and your motor, especially if you drive it aggressively. Always change your filter when changing your oil.

      Helpful (7) Show 3 more answers

      hi how many quarts is required for a 06 gt to carry out a oil change also will i need addactive or just a straight oil change thanks

      my mustang v6 2006 with 34k I installed the procharger p1sc and it is my first oil change I wanted to know what kind of synthetic oil I would recommend to take care of the engine of my pony

      • The 2006 Mustang will use 5 quarts of 5W-30 Oil as directed by Ford via the Owners Manual.

      Helpful (0)

      Can I start using this in my 2006 gt if the motor (as far as I know) has never used synthetic before?

      • Yes, you can go to the full synthetic oil, however, once you start using the full synthetic it would be recommended to stick with that type of oil for future changes. 

      Helpful (0)

      Is this the oil I will need on a 2016 Mustang GT? Or should I go 5w30 or the XPR Race 5w20? Not sure of the differences.

      • The 5w20 would be ideal to run as this is the standard recommendation from Ford.

      Helpful (0)
      Post Your Question
      10 More Questions
      Hello, I have a 2003 Mustang GT. When I went to the Royal Purple website, and used their lubricant advisor, their is no listing for a 2003 Ford Mustang GT. Can Royal Purple 5W20 be used in my vehicle? 1 answer
      I have a 2016 Mustang gt with 24k miles it is my daily driver wanted to know if this is the best crown royal oil to go with. 1 answer
      I have a 2006 V6 Mustang with approximately 95,000 miles on it. I was planning on using this oil at least every other oil change. Would that be possible to switch back and forth or once used would I just have to keep using this same oil? It would still be synthetic oil however I'm not sure if I would be able to switch back and forth between brands even though they would both be synthetic due to the additives and difference between the two. 1 answer
      Hello I have a 2016 Mustang GT(Automatic). I have 7300 miles on it and this will be my first oil change as the owner. Should I use Royal Purple 5w20? Wanted to switch to full synthetic oil and this seems like the best out there. 1 answer
      diferences between this one and the HPS? pros and cons? thank you! 1 answer
      I own a 2006 gt with 15000 miles, and I always use 5w-30 synthetic motor oil from mobil or castrol, the car feels and run fine but, do you think if a change the viscosity of the oil, the car will feel better than using an 5w-30, or it would be too late to make the change. The oil cap recommend 5w-20 but the owner´s manual indicates 5w-30. Wich is best for my engine? 1 answer
      I have a 2004 V6 Mustang with 150k miles on it. Should I use this oil or should I start using 5w30 instead? And how often would I need to change the oil with this one as opposed to the other? 2 answers
      I have only 5500 miles on my 14 now would it be ok to switch to this oil now or should i stay with ford oil a lil longer? 1 answer
      Can I use with Lucas products? Every oil change I have every performed in any of my vehicles since I was a teenager I have added the lucas oil additive. Would it make any difference if I were to add in a quart of lucas with this product? 1 answer
      Recommended oil amount for a 96 Cobra So I have heard and seen a lot of different opinions on how much oil to put in my 1996 Mustang Cobra. The manual says 6 quarts but I have heard of people using 7 or even 8 quarts. What are your thoughts? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Bottle

      Tech Specs