Hot Rod magazine Endorses Royal Purple® Lubricants

"It occurred to us that we've yet to run a test with Royal Purple® oil that didn't result in a power gain—it might be a marginal gain (as with our little Acura Integra), but it's a gain.

We've also torn down some of our dyno engines that have been seriously abused, but with Royal P in the pan, the bearings have looked new.

So consider this an approval of the company's line of synthetic lubricants with Synerlec®.

We also like the spray lubricant, and while we can't document any improvements thanks to synthetic wheel-bearing grease, it makes us feel like we're doing the right thing when we pack bearings with that stuff, too."