Ok so that pressure is a good thing, cool!
I run straight non detergent 30w in mine right now
I usually run 13 psi after I'm warmed up at low rpm and then running at like 50 mph I'm getting about 16 or 17 psi

Stovebolter -- the Next Generation
(I'm 20)

1941 Chevy 1/2-ton pickup
"Lucy"
In the Stovebolt Gallery
More pix on Photobucket

1967 Ford Mustang - "Sally"