Recommended Engine Oil ?

[Aubrey N Bruneau]

Because of the astronimical cost of even aquiring a passenger car 409 block and corresponding large port heads, yet alone the cost of preparing it the best I can for the class ( I'm not really in the income bracket to be playing this game ! ).... I keep re=assembling it with the good 'ol reliable Melling M55HV. The terror of spinning a bearing seems to always keep me on that side !
With the 30 W that I've been using, fully hot oil, I go through the traps at no more than 75 PSI. As mentioned, idle will be around 20-25. At 3000 RPM, it will be at 70.
So, I'm thinkig that while my "high side" may be 15-20 pounds excessive, the drastic change that I see in oil pressure when cooler, is more of a viscosity issue. I was going to go to that real light stuff, but I think that my loose bearing clearances may not get enough "padding", and would simply get washed out because of too much "hemorage" !

err on the side of caution
I've blown this thing up twice now. Once in 2005 because of a broken ARP rod bolt, and a second time in 2009 because of a failed Comp Cams tool-steel spring retainer.
Can't afford to fix it again !

Thanks guys
Remember, I'm there to add to the car count, and take my position at th ebottom of the ladder !