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Royal purple hp oil
Posted: Mon Feb 11, 2019 10:10 pm
by 1972ho
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?
Re: Royal purple hp oil
Posted: Tue Feb 12, 2019 8:06 am
by pdq67
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
Re: Royal purple hp oil
Posted: Tue Feb 12, 2019 10:23 am
by Newold1
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!!!!!
Re: Royal purple hp oil
Posted: Tue Feb 12, 2019 10:43 am
by prairiehotrodder
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
Re: Royal purple hp oil
Posted: Tue Feb 12, 2019 9:03 pm
by MELWAY
Have any royal purple users notice upon disassembly that metal parts especially cam and lifters have a bright mirror like polished finish to it
Re: Royal purple hp oil
Posted: Wed Feb 13, 2019 12:15 am
by gruntguru
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.
Re: Royal purple hp oil
Posted: Sun Mar 10, 2019 5:00 pm
by MELWAY
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