Engine Oil: what's best?

[ADM]

Thats fairly frequent isnt it?
I've been using the HPR5 full synthetic for a while now and happy w it, it runs fine.
Actually the car is about to hit the big 50k mark but i have no idea what it had in it before i bought it, 25ks ago.

Interestingly i never had an understanding of the importance of oil grade/quality before and the KH has only had whatever the dealers used for all those years. Recently i made sure it had HPR10 and it seems to be ok with it. Its got over 200ks now and im led to believe the slightly "thicker" oil is better for rhe older engine.

My oil & filter change intervals are more frequent than what the service book says yes. I do this out of choice & not out of necessity.
Old Sh**ty oil is often the main culprit of engine failures, and frequent oil changes with premium synthetic oils is the reason why my engine looks like new with 120,000ks on the clock.
In high KM engines, thicker oil is often recommended as it usually reduces oil consumption, blow-by & engine smoke due to it's higher viscosity.

All the same I was suprisingly disappointed with the HPR10. So far it has been the worst oil I've used in my car. Hopefully, the HPR5 fully synthetic will be better, otherwise I'll go back to Mobil1 or Shell Helix Ultra Fully Synthetics & ditch Penrite altogether. I only gave the Penrite consideration again for the first time in years based on the feedback of other members here.

I remember years ago when I used to use Penrite's mineral based HPR70 in my old HK Holden & V8 Commodore & I'm adamant that the quality of that particular oil dropped significantly.
Back then I tried several replacement oils before settling with the STP 50 plus which gave the best combination of flow, protection, longiveity & consistency for the old pushrod V8's & red motor 6's I was driving at the time.