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Royal Purple 5w20 Motor Oil

Item 45000
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      Video Review & Installation

      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

      Features & Specs

      • 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.

      Royal Purple 01520

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Bottle


      Customer Reviews (142)

        Questions & Answers

        10 More Questions