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Royal Purple 5w20 Motor Oil

90 Reviews
Our Price


  • Item #45000
  • MPN# 1520

  • Market Price $12.99
  • You Save 23% ($3.00)
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  • 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.
  • V6 needs 6 quarts for a complete oil change.
  • V8 needs 7 quarts for a complete oil change.

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 Details

What's in the Box
  • (1) Bottle
Installation Info
Will it fit my Mustang?
  • Boss 302 - 12, 13
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17
  • Bullitt - 01, 08, 09
  • Cobra - 94, 95, 96, 97, 98, 99, 01, 03, 04, 93
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17
  • GT500 - 07, 08, 09, 10, 11, 12, 13, 14
  • EcoBoost - 15, 16, 17
  • GT350 - 16, 17

Most Helpful Reviews

Daily Driver

I know I can trust Royal Purple. I feel safe and know my Mustang is in good condition!

Helpful (1)

Mustang Owners

If you have a 2005 thru 2010 Mustang GT this is the only oil to use, believe me.

Helpful (1)

Overall Rating 4.9 out of 5 stars
Read All 90 Reviews

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8 Questions / 12 Answers

Ask a Question

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.


    Good Answer (2) (3)

Show 3 more answers Question Resolved

Can I use this oil weight on my 08 GT with 63K Miles?? I recently bought the car and will do my 1st oil change soon. At Autozone they told me for my car I need 5-30 but in the filler cap I believe I saw 5-20, is that only if the car is new? Or can I go ahead and use this on my car?? *08 GT with 63K Miles* Many thanks!


  • While it's never a bad idea to stick with what the cars stock oil cap calls for using a slightly different thickness of oil, such as the 5-30 vs. your 5-20, will not harm anything.


    Good Answer (0) (0)

Show 1 more answer Question Resolved

1990 GT 5.0 Will this oil work on a 5.0 1990 stang or should i get the 5w30?


  • Jimmy great question. I would recommend 5w30 or 10w30 for your 1990 Mustang. I hope this helps. Thanks, Andy


    Good Answer (0) (0)

Show 1 more answer Question Resolved

1996 Vortech Supercharged GT Will this be a good oil weight for my 96 vortech GT? I want to keep my supercharger running as best and smooth as possible. I know royal purple is great. I'm more concerned about the oil weight. will this work good?


  • I had a 1998 gt with the vortech supercharger with intercooler and aftercooler with 132000 miles on it I ran the same oil and weight in it and the guy I sold it to still uses that oil to and it's still running strong with 190000 miles or so on it now so yes from experience that oil is perfect for it


    Good Answer (1) (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

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?


  • If your car has the stock oil pan, use what the manual says. Too much oil is worse than a half quart low.


    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

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?


  • It shouldn't be a problem, as long as it's the correct viscosity for your car.


    Good Answer (0) (0)

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Customer Reviews (90) Write a Review

Overall Rating 4.9

out of 5 stars

  • 5/5

    March 06, 2013

    Daily Driver

    I know I can trust Royal Purple. I feel safe and know my Mustang is in good condition!


    Year: 2001 Submodel: V6 Texas

    Helpful (1) (0)

  • 5/5

    August 29, 2009


    i can tell a big diffrents from regular synthetics..i didnt believe it til i tried makes my pony run smooth.


    Helpful (1) (0)

  • 4/5

    July 18, 2009

    Royal Purple 5w20

    Great oil, but on the pricey side.


    Helpful (1) (0)

  • 5/5

    June 23, 2009

    Mustang Owners

    If you have a 2005 thru 2010 Mustang GT this is the only oil to use, believe me.


    Helpful (1) (0)

  • 5/5

    June 15, 2010

    Royal Purple

    I've heard a lot about this oil, and decided to try it, Wow great product, and American Muscle will ship right to your door with free shipping, thats awesome!

    Harry Aniba

    Helpful (5) (0)

  • 5/5

    June 29, 2010

    Royal Purple

    Great oil, great service, free shipping - what more could you want

    J Witherington

    Helpful (5) (1)

  • 5/5

    April 24, 2010

    great product

    It does what it is supposed to do , can feel it but I did the whole car from mobil1 to RP at one time from front to back.


    Helpful (4) (1)

  • 5/5

    May 28, 2013

    Great oil

    I love Royal Purple fluids. Top quality products. I would recommend them to any fellow car enthusiast out there. Especially those who like to push their car hard.


    Year: 2014 Submodel: GT Leesburg, VA, USA

    Helpful (2) (0)

  • 5/5

    January 11, 2013

    Great price for great oil

    After the oil change I noticed a decrease in engine noise which tells me that the oil is doing a better job protecting and lubricating my Mustang's engine than those other brands. Thanks again for another great product American Muscle!


    Year: 2011 Submodel: GT Springfield, IL, USA

    Helpful (2) (0)

  • 5/5

    June 30, 2012

    Mo' Slicky

    I was told you could feel the difference, I was skeptical. Now I am a believer. Could actually feel the Coyote ran. Royal Purple from now on. Thanks...


    Year: 2012 Submodel: GT Greenbrier, Tn

    Helpful (2) (0)

  • 5/5

    February 22, 2012

    great oil

    I order this one for my first oil change I can really feel the difference!! Great stuff


    Year: 2012 Submodel: V6

    Helpful (2) (0)

  • 5/5

    July 16, 2009

    motor oil

    ill keep buying royal purple showed 5hp extra to the wheels


    Helpful (2) (0)

  • 5/5

    March 16, 2013

    This was my first date with American Muscle :-)

    It was great pricing on Royal Purple that brought me to the AM family. I've been using Royal Purple for years now, and I've never had any kind of engine problems. I always go the maximum recommend mileage between oil changes - which translates to only doing annual (yes, once a year) changes on my vehicles. I have a Ranger, an Accord and of course my Mustang.


    Year: 2011 Submodel: V6 California

    Helpful (2) (1)

  • 5/5

    July 09, 2013

    Great oil

    I only use royal purple products and could not be happier with this oil.


    Year: 2012 Submodel: GT Philadelphia, PA, USA

    Helpful (1) (1)

  • 5/5

    March 30, 2012


    okay lets just say this... my 1988 mustang has an oil leak (not sure from where yet) so im sticking to the conventional oil BUT AM is awesome and my 08 Fusion needs an oil change :) so now you know why im writing this review. anyway i tried royal purple before and its awesome! i get about 1+ better mpg and i couldnt ask for more cuz it all makes the difference. Did i mention that the oil IS purple?! straight win. Oh and AM sells a quart for $8.99 while my local auto parts stores in CA sell it for about $10.99 so u cant go wrong.


    Year: 1988 Submodel: Other San Jose, CA, USA

    Helpful (1) (1)

  • 5/5

    December 21, 2009

    outstanding product

    My best review is a post I made on Grey Mustang Forums


    Helpful (1) (7)

  • 5/5

    October 20, 2016

    Awesome product

    I got this motor oil for my pony because it was time to change so i can keep it running like new.


    Year: 2001 Submodel: V6

    Helpful (0) (0)

  • 5/5

    September 09, 2016

    Royal purple oil

    I really recommend it , it makes the engine running smooth and it helps to give extra HP


    Year: 2016 Submodel: GT

    Helpful (0) (0)

  • 5/5

    August 22, 2016

    Running Smooth

    In buying my vehicle pre-owned, for the first oil change I wanted to switch everything out to something with a good reputation. After reading all the great reviews I ordered and the box was at my door quickly as usual from AM. Did the oil test and started it up. All seems to be running great. Everything does sound and feel a bit smoother!


    Year: 2013 Submodel: GT

    Helpful (0) (0)

  • 3/5

    July 29, 2016

    BBQ tick after this fill

    Have had to do countless hours of research over my last oil change. I have always used amsoil or mobil 1 full synth. This go around I figured what the heck.. I will try RP. After my fill, sitting in a drive-thru I get the infamous "BBQ tick" at idle. Its intermittent and seems to only really occur after oil changes for our 5.0s. Not going to use this again, and will try amsoil again after. Not sure if its the oil to blame, or what. I didn't overfill it.. So I am just putting a buyer beware out there. People seem to love this stuff, and I am not 100 sure what is causing my tick.. So 3 stars for now.


    Year: 2011 Submodel: GT

    Helpful (0) (0)