Royal Purple 11748 HMX SAE 5W-30 High-Mileage Synthetic Motor Oil - 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.

My Subaru was consuming oil this oil took care of the problem. 👍👍👍👍👍

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.

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.

Excellent oil

I use the product after being involved in testing large electrical producing engines wear.

royal purple is good oil ,doesn't break down like some oils at high temperature and loads,I use the hmx in all my gas powered vehicles and I check for metal on the magnetic oil plug and in the oil,and notice drastically less wear material when using this oil.

Great oil.

古めの車に入れると、エンジンコンディションが改善したことを体感できます。

High caliber product.

Excelente

El aceite es cierto que llega en presentación diferente a la de la foto, pero el producto es genuino y el precio es más accesible que en auto zone mexico

Great quality engine oil!