Royal Purple 11750 HMX SAE 10W-30 High-Mileage Synthetic Motor Oil - 5 qt., Model:ROY11750

Good oil, never had an issue with it.

Arrived Early.

You get exactly what you pay for and this is exactly what I needed.

I use this particular oil in my Honda EU7000is inverter generator. I started with regular royal purple at 100 hrs. At 1000hrs I switched to the high mileage version. I recently completed the 2000 hour service and the engine internals look brand new. Bearing wear was non existent and zero evidence of blow by. After measuring clearances I literally put the engine back together as-is. Keep in mind Honda does not use oil filters on these smaller engines. I change the oil every 200 hours and honestly it looks the same coming out as it does going in. I could probably go 400-500 hrs on a change but at about a quart per oil change it’s cheap insurance to just do it more frequently. I use royal purple products in my other small engines and vehicles and it has always performed excellently.

I love this stuff. Pricey but we'll worth the price...

will buy again

I used this product in my 94 Toyota with a 3VZE engine, an engine not known for gas mileage or even being a silent running engine. I religiously change my oil every 3500 miles at maximum as highway driving is not the friendliest to these vehicles with their gearing. This oil went in a beautiful dark purple, and came out a modest dark caramel. I guess the purple breaks down as it ages. The oil could have had a longer life and it almost seemed like I was changing it prematurely. When I put this oil in, after 10 miles the engine would idle silently to where you could only hear the injectors firing. When driving the vehicle delivered an extra 3mpg on this oil compared to Mobil 1. I ended up having to go back to Mobil this oil change because timing didn't line up to get this, and none of my local auto stores even carry the HMX (though they should) just the regular. I highly recommend this to anyone looking at trying a new oil. Best oil I've ever used. Period.

I'll tell you why.I was running Mobil 1 High Mileage in my 1990 Dodge Dakota with about 300,000 miles on it. It was due for a change so I fed it the Purple and gave it the matching filter just 2 days ago. All the engine noise has completely disappeared. There was lifter knock, now not a peep. Oil pressure is straight in the middle of the L and H, even with the fresh Mobil 1 I'd only reach 1/3 across the gauge and less when it got hot. RP is straight up on the gauge all the way to work and back.~$7.50 a quart to keep my old Dodge alive for another few years is a bargain, and Royal Purple is the best oil money can buy.Backstory:The reason I switched my truck over to RP is because I did it to my wife's 96 Dakota first. Her's got the 10W-40 HPS.The oil pump is/was worn in her truck and oil pressure was low. I took her truck to a mechanic who tried to clean all the gunk out, but oil pressure remained low, so he changed the oil to 10W40 (cheap stuff) and added a quart of Lucas. That kept her oil pressure just above the L when hot. A few months later I changed her over to RP and her oil pressure problems were solved, and her engine runs quiet and smooth. No more Lucas, no more oil warning lights.Going forward, I'll never use another brand of motor oil (unless RP gets bought out by the Chinese or something) in any of my vehicles. It's worth every penny.