Royal Purple® HMX® Synthetic SAE 10W-30 High Mileage Vehicle Motor Oil, 10 lbs, 5 Quarts

from Grunt49

Have used Royal Purple in the past. Very good oil, hard to find the ZDDP already mixed in the oil locally, I hate to use additives,at least this already has it .

from Steven

Pricey, but a great product.

from Mercomatic

I've used Royal Purple High Mileage Motor Oil in the past and it seems to maintain the power of my 33 year old engine as well as its good gasoline mileage. I would recommend this product for those with high mileage cars.

from RP fan

I have been using HMX 10W30 and HMX 5W30 in our two cars. The HMX oil stopped some minor oil leaks we had in the valve cover gaskets. I change the oil once a year in April after winter. We put about 8000 and 5000 miles annually on the two cars. RP works just fine. Haven’t had any issues and like...

from RNeely

This is great motor oil and apparently hard to find in my area. I've checked everywhere and no one stocked it not even the local wal mart, but was happy to find it on line. Was having a low oil pressure problem and whenI changed to this the problem went away. Good Stuff!!