Which oil to use? Solid Roller

Here are some specs
500 in wedge
Comp Solid Roller cam
Procharger set up
around 800 hp.

I am currently using Brad Penn 20-50
It is difficult to find and expensive.

Are the are good options?

Valvoline VR1 Racing 20w50 is what I always run. Zinc level is around 1200ppm when I test it. Just bought 2 cases on sale from Napa for $4.80 a Qt.

On your deal, especially if you drive it when the outside air temps are below 50F, I would use either 5W20WT, 5W30Wt or 10W30 WT.
As far as which brand I like and use Valvoline oil based non synthetics oils, maybe VR1 with higher valve spring pressure for solid roller cams

I doubt that it matters much. Pick a viscosity to match your bearing clearances and pay attention to the oil temp. If the oil temp gets hot then you might want to run a synthetic. Otherwise any name brand oil will work.

The "20" part takes longer to reach the farthest bearing. Drop to 5W or 10W-50.
My recent experience: factory calls for 10W30 (Toyota factory turbo engine), gets used in cools temps and 250 hp over the original engine, last change used 5W40.
Feels the same, except... the hot idle speed is down slightly - takes extra power to churn through that 40.

Ok, not all of Canada is above the Arctic circle - in fact, a large portion of the Canadian population lives further south than you Cab !!

Nu-Gold is the right stuff for you but I always ran rotella

The last time I look at a good globe the only part of Canada that is further south than central Oregon is near Detroit
Is that one of the densest population centers in Canada
Isn't Toronto and Quebec further north than Bend, OR?

MOBIL 1 0w40 for that would be great.

Is Driven oil available to you?

IMO, an 800 HP engine isn't something that I'd want to cheap out on the oil.

Valvoline VR1

I heard good things about VR1


I had read about 10-50 vs 0-50 The 10-50 weight maybe better due to the modifiers.
https://www.bobistheoilguy.com/motor-oil-103/

This is very good oil. It has a high PSI lubrication ability. Check out over 200 oils ranked by PSI --by 540 RAT GUY. He has a blog to ask questions and has ranking of all the popular oils put to his test. Amzoil 5w-30 Signature series is his highest ever ranking oil ever..But M-1 0w-40 Full Synthetic is right behind it. He runs 800 HP motors and his oil of choice is QS 5w-30 FS because it holds it values at higher temps. Anyway, good read and take it for what you get out of it.

That guy is a joke. His testing is a joke. His results are a joke.

I have used Brad Penn (now Penn Grade 1) for many years.
The 20W-50 is in my street/strip car since the oil gets hot driving on the street.
I have been using 10W-30 in my drag race cars for years. A local supplier sells a case of 12 for $75.

IMO, Mobil VR-1 is just fine.

https://board.moparts.org/ubbthreads/ubbthreads.php/topics/804694/1.html

The Mobil One 15w50 synthetic I used to use got hard to find for a while, so I went w/ the VR1.

since Brad Penn has become harder to get around here I have changed to Valvoline VR-1 and get it at Rural King for 4.99 a quart.