I have look at VR1 with interest thanks Don you are familiar with my build. I just turned 3000 miles .What Brad penn would be best? Would weight have any bering on temp. Yesterday it was 95 degrees outside and intake man was reading 235. hotter than i like and runing a little sluggish???
Pay attention to that temp and humidity. It will tell you a lot about your tune. Not to mention depending where you are at in CO that thin air. I hated that.
I use Royal Purple Synthetic 10W-40 High Performance Street oil in all my engines.. If you ever read the description of the various RP products and if only half of it was true you wouldn't use anything else.
I ran Royal purple break in oil on my first run, break in, then drained, and am running it now for 500 miles, then on my normal oil I'll run Brad Penn, I just like the Royal Purple break in oil, Zinc already in there.