film strength of leading synthetics

[Jeff CA]

Interesting film strength test, comparing RP, Mobil 1, and I believe Amsoil.

Of particular interest to me was the end of the test.

HPS - High Performance Street Motor Oil | Royal Purple

There's a video on this page. If someone can provide the direct link, go for it.

 

[Badunit]

Not Amsoil. Not the correct bottle. Looks like a Driven Racing Oil bottle. Leaving out Amsoil leads me to believe it fared as well or better than the Royal Purple.