Royal Purple 11748 HMX SAE 5W-30 High-Mileage Synthetic Motor Oil - 5 Quart
Condition: New
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This item is eligible for return within 30 days of receipt
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Availability:
Only 6 left in stock, order soon!
Arrives
Thursday, Oct 22
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Size: 5 Quart
Features
- Specifically Designed To Minimize Wear And Restore Lost Performance In Engines With More Than 75,000 Miles
- Formulated With Robust Zinc/Phosphorus Anti-Wear Compounds Combined With Royal Purple'S Proprietary Additive Technology
- Hmx Is Chemically Enhanced To Revitalize Hardened Seals, Reducing Oil Consumption Common In High-Mileage Engines
- Reduces Friction And Metal-To-Metal Contact For Peak Engine Performance
Description
Royal Purple located in Porter, Texas, produces a wide range of high performance lubricants for nearly every consumer and industrial application. Royal Purple's founder John Williams was a pioneer in the development of high performance synthetic lubricants and collectively, Royal Purple's formulators have more than 200 years of expertise in developing high performance lubricants. Royal Purple focuses exclusively on developing state-of-the-art lubricants. Unlike companies that primarily focus on fuel and other petroleum byproducts, Royal Purple's sole mission is to develop products that significantly outperform other synthetic and mineral based oils. Royal Purple is very active in the lubricant industry and its related associations.
SAE J300 Viscosity Grade: 5W-30
Brand: Royal Purple
Liquid Volume: 160 fluid ounces
Package Information: Bottle
Vehicle Service Type: Car
Brand Name: Royal Purple
Manufacturer Part Number: 11748
UPC: 641330117480
Global Trade Identification Number: 80
Manufacturer: Royal Purple
Size: 5 Quart
Unit Count: 1 Count
Included Components: Motor Oil
Item Type Name: Motor Oil
Item Weight: 2 pounds
Model Number: ROY11748
Manufacturer Warranty Description: Manufacturer warranty
SAE J300 Viscosity Grade: 5W-30
Container Type: Bottle
Compatible with Vehicle Type: Car
Viscosity Level: Medium to High
Automotive Fit Type: Universal Fit
Liquid Volume: 160 fluid ounces
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Oct 22
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 1 Quart
I've been using Royal Purple for years, and it has never let me down. This high-mileage oil helps keep my engine running smooth and quiet, even with higher mileage. Oil consumption stays low, engine protection is excellent, and it performs well in both hot and cold weather. It's easy to use, provides great value for the quality, and gives me confidence that my engine is getting the protection it deserves.
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Reviewed in the United States on July 23, 2026 by Amy Biggs
Size: 5 Quart
Listen, I get it. Everyone has some automotive elixir or magic potion they swear by. "Put this in your tank, and it will be like a new car!" We all wish it were true, but in reality, there's nothing you're going to put in an engine to bring it back to life, or keep it running 500,000 miles. But I can tell you this with complete honesty: Royal Purple was (and continues to be) absolutely worth the money in my case. At around 140,000 miles, the engine of my 2008 Jeep Grand Cherokee was noticeably louder than it was in its youth. Not a terrible noise, but there was definitely a mechanical clatter that wasn't there before. I'd also started to notice that when I changed the oil, I was getting less and less back out. I'd put 5 Qts in, and 3,000 miles later I'd drain out just 3 or even 2.5 Qts. I never noticed any oil on the driveway, so I don't know if it was burning it or only leaking while running, but it was going somewhere. One morning, after I'd gotten a little lazy and went a bit past my usual 3K oil change interval, I noticed the oil pressure light starting to flicker. Checked the stick and it was just barely registering. Something had to give. I didn't want to be the guy putting a Qt of oil in his old clunker every week (in other words, my Dad). So I started looking around and saw that Royal Purple was making some big claims with their high-mileage oil. Rejuvenating seals and cleaning your engine, that sort of thing. I kept doing more research, and the surprising thing was that more and more people seemed to be backing it up. What finally convinced me to make the switch was a YouTube video where they took the valve covers off an old engine before and after running Royal Purple through it -- there was no denying it looked cleaner inside. So I spent the money, even got the proper filter. Went ahead and did the shorter interval for the first change that they recommend to get the loose stuff out of the system before really settling in to the fully synthetic oil, even though it meant spending double. I figured if it worked, it was worth the money. Well, that was over 20,000 miles ago, and I'll be damned if things haven't improved. The engine is without question quieter, and at idle, is noticeably smoother running. But the best part is that the oil loss has been reduced dramatically. Now when I put in 5 Qts, I get 4 Qts back out. It's not perfect, but considering nothing has changed other than the oil, I think that's a big win. I no longer have to religiously check the dip stick every week for fear of an empty pan before the kid needs to go to school. End of the day, I'm just one guy who enjoys fiddling under the hood from time to time. I'm no expert, I can't tell you how or why things improved with Royal Purple. Maybe it's all just coincidence? All I know is that it's worth it for me to keep spending the extra money. I want to keep my engine running as well as possible, for as long as possible, and to me that means always using Royal Purple.
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Reviewed in the United States on April 29, 2024 by Tom Nardi
Size: 5 Quart
Im adding 3 pictures with this review.. this product is absolutely amazing.. ive done a real test with real results using royal purple hmx 5w-30 for a total of 3 - 5k mile intervals. These are pictures of the underside of my oil cap. I have a 2002 toyota solara sle v6 with 186k miles.. as you can tell, the previous owners neglected this cars oil, and was probably running conventional.. there was an early 90s lawsuit against toyota for this cars engine ( 1MZ-FE ) and was very sludge prone, oil galleries would get clogged and the cars would quit.. with proper care, these cars will easily go beyond 300k.. the second picture is after my 2nd run and the third is after my 3rd cycle, for a total of 15,000 miles running just hmx.. This oil was designed for high mileage vehicles and is geared more towards protection with their synerlec additives, why it surprised me to see it cleaning this well.. plus my engine has NEVER been this quiet.. royal purple is not just hype, they are the real deal. Better to spend a few extra bucks and treat your car to a real spa then run junk inside of it. Amsoil ss is the only other oil ive used that compares. Am a happy customer!!! Update, got my Blackstone laboratory report back on a 3k mile run with royal purple hmx, couldn't went another 5k miles.. this oil was giving my engine next level protection.
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Reviewed in the United States on October 3, 2025 by Travis Coffey
Size: 1 Quart, Case of 6
I drained out Castrol High Mileage Synthetic blend from my 07 chevy Suburban with a 5.3 and replaced it with this royal purple high mileage. At start up it sounded about the same...Slightly less noise I would say. I'm not sure if you can say it was quieter because of the Royal Purple or because the Castrol had 2,500 miles on it and it was time for a change. I will say that it did have a little valve noise at first. It did however quiet down after about 2minutes; which I would assume is about how long it took the oil to fully cycle through the motor and coat the metal surfaces well enough. I did notice a difference on long road trips and after I got the motor really warmed up. The Castrol always had a slight valve rattle even when it was just poured in. The Royal Purple seems to keep the noise down at all temps, especially after long trips when the engine is nice and hot. When I pull up to a stop I no longer have the infamous 5.3 afm rattle. If you know about the chevy afm motor you know what I am talking about. My 5.3 has never really had a problem with excessive oil consumption, so I can not speak for oil burn with the Royal Purple. I generally have put .75 to 1 quart per 3k. I would not consider that an oil consumption problem. I have 120k on the motor and it runs Very strong; 1 quart every 3k is fine by me. Overall, I think it has made my engine run a bit smoother and quieter. I will buy again.
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Reviewed in the United States on August 9, 2015 by Consumer
Size: 5 Quart
I've used royal purple for years, it's a great product which made this purchase a no brainer, great price and fast shipping.
Reviewed in the United States on March 21, 2026 by Big C
Size: 5 Quart
This isn't snake oil. It's a giant Step Up for most of the oils you can buy off the shelf. All of my engines run more smoothly and produce a little bit better MPG.
Reviewed in the United States on May 12, 2026 by Jmandrumz
Size: 1 Quart
I use the product after being involved in testing large electrical producing engines wear.
Reviewed in the United States on August 6, 2026 by Kenneth
Size: 5 Quart
Purp
Reviewed in the United States on August 15, 2026 by Brandon S