New domain: www.Speed-Talk.com

The forum is currently running on the new domain and server. The old domain will remain active for a short while to forward any (less frequent) visitors.
IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/

Royal purple hp oil

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Post Reply
1972ho
Expert
Expert
Posts: 741
Joined: Thu Nov 21, 2013 12:52 am

Royal purple hp oil

Post by 1972ho » Mon Feb 11, 2019 10:10 pm

Do you all know if royal purple high performance synthetic oil is good enough to run in 15-1 8000 rpm motor that is drag raced,it’s kind of hard to tell if there xp oil is any different than the HP oil.Anyone use it?

pdq67
Guru
Guru
Posts: 8404
Joined: Thu Mar 04, 2010 8:05 pm

Re: Royal purple hp oil

Post by pdq67 » Tue Feb 12, 2019 8:06 am

540Rat could probably tell you, but he pretty much left the sites!

He had a real passion for oil information is why I mention him...

Rat was kinda treated like me when some called me a, "Shill", for UDHarold back when Harold was still with us.. I paid them no mind and continued on.....

Heck, just call Royal Purple and ask them.

pdq67

Newold1
Guru
Guru
Posts: 1962
Joined: Fri Apr 08, 2016 9:50 am

Re: Royal purple hp oil

Post by Newold1 » Tue Feb 12, 2019 10:23 am

Please no more oil or oil filter discussions here on SpeedTalk. There have been enough discussions and posts here on SpeedTalk alone , yet on internet chat sites to fill the National Library to the roof!!

Please especially new SpeedTalkers, USE THE SEARCH BOX!!!!! :x
The Older I Get, The Dumber I Get :wink:

prairiehotrodder
Expert
Expert
Posts: 980
Joined: Sat Dec 24, 2011 10:02 am

Re: Royal purple hp oil

Post by prairiehotrodder » Tue Feb 12, 2019 10:43 am

I used royal purple in a 7000 rpm BBC for awhile and found it turned brown right away. Not sure why and if it was a problem or not but i didn't like it. I switched to amsoil racing oil and haven't looked back. Sorry thats not scientific in the least. Just my experience.
Brian
The Word of God is quick and powerfull
www.therocketshop.blogspot.com

MELWAY
Expert
Expert
Posts: 851
Joined: Mon Dec 04, 2006 7:37 pm

Re: Royal purple hp oil

Post by MELWAY » Tue Feb 12, 2019 9:03 pm

Have any royal purple users notice upon disassembly that metal parts especially cam and lifters have a bright mirror like polished finish to it
3370lb Sedan 9.89@136MPH 358chevN/A

gruntguru
Pro
Pro
Posts: 333
Joined: Fri Apr 10, 2015 7:56 pm

Re: Royal purple hp oil

Post by gruntguru » Wed Feb 13, 2019 12:15 am

Royal Purple will often turn brown on the first fill because it is highly solvent and cleans carbon, varnish and other residues left by previous oils. I have seen wear-metals increase sharply on the first change to RP then reduce to lower levels than previous on subsequent oil changes. Same reason - wear metals contained in the carbon, sludge and varnish deposits.

"Micro-polishing" is one of the RP claims. When the EP additives are called upon (as in cam/lifter) the asperities flow and polish, rather than welding and tearing off.

MELWAY
Expert
Expert
Posts: 851
Joined: Mon Dec 04, 2006 7:37 pm

Re: Royal purple hp oil

Post by MELWAY » Sun Mar 10, 2019 5:00 pm

I can say DO NOT use royal purple HPS on a flat tappet cam...
I just inspected a sbc flat tappet after a few races and test sessions and half the lobes have pitted flat noses

This bottle of HPS also lab tested to have low levels of zinc and phosphorus (Zn 1037ppm. P 843ppm)
Also after engine not run for 3 months the cam looked almost dry as if oil had evaporated from lobes

This cam and lifters did its first season on brad penn 40w and looked like new it then did half a season on Penrite synthetic racing oil and still looked almost like new
3370lb Sedan 9.89@136MPH 358chevN/A

Post Reply