Penrite HPR-5 5W-40 some questions

[alcyon]

I recently came a cross a dealer selling this oil at a good price to me.
It comes in a 5L bottle.
I see that it's 100C viscosity is on the higher end of the 40 scale, at 14+ cst.
Anyone used this before ? Also interested to know it's base oil class, a group3 or group 3 with some 4?
This is just out of curiosity and I just want to know as a matter of fact so please no flame war about group 3 vs group 4 base oils. Also what is it's HTHS ?
Three things interest me on this oil, the high viscosity, the high zinc 1200+ppm, and high 10+ TBN.

 

[FCD]

I would use it for sure if it weren't so hard to get and expensive here in Spain.

 

[shanegtr]

Fairly common oil here in Australia. I'm not 100% on the base stock, but from the UOA I'd say its primarily a class 3 - its got a reasonable oxidation reading so possibly theres some class 4 in the mix. No idea on the excact HTHS. But going of its specification it would be >3.5

 

[Greasymechtech]

64742-54-7 >60 %
I doubt any group anything else besides additive package and VII/VIM

Full z/p and ash

 

[alcyon]

So I guess there will some drop in fuel economy vs Shell Helix Ultra that has like 12.8cst at 100c ?

 

[Retirednow]

I used it a long time ago. It’s everywhere

 

[Motu]

All Penrite oils are made for extreme use - they do make an Enviro range that might be better if your only concern is fuel economy.

 

[SR5]

Penrite HPR 5 (5W40) full synthetic is a high quality and popular oil in Australia. I always assumed it was mostly Group-III as they loudly push their PAO content for the Penrite 10-Tenths series, not for their HPR series.

However the HPR 5 is API SP, ACEA A3/B4 and MB 229.5. You would never get these OEM specs with the 10-Tenth series which are their 100% PAO & Ester performance oils, but light on real specs.

The MB 229.5 is real, and they even publish the Mercedes Benz approval certificate on their website.
https://penriteoil.com.au/assets/img/oem_pdfs/HPR5 & PREMIUM 0 MB 229.5.pdf

Like all HPR oils, the HPR 5 is thick for grade (KV100 = 14.4 cSt), has a high TBN (10.4) and lots of ZDDP (Zn = 1240 ppm).
I've not used the HPR 5 myself, but back in my air-cooled motorcycle days, I ran HPR 30 (20W60 mineral with 1530 ppm zinc, and KV100 = 23.5 cSt) in everything. It was the only oil that didn't shear down to water in my shared sump gear box. I also ran HPR 30 when travelling the outback in my old Holden Kingswood sedan that would overheat when pushing through the desert sun, so I wanted a bit more thickness on my side.

 

[SR5]

BTW before the UltraClean came along, from memory the previous version of Castrol GTX 15W40 had a KV100 =14.5 cSt, and a HTHS of 4 cP.

I don't know the HTHS of the HPR-5, but I would assume a touch under 4.