joe gibbs xp4 15/50 non synthetic(breakin). like i said last 2 builds had .002 on rods and mains with full groove and using 20/50 amsoil, no issues. i had 100# oil pressure when first fired up, 75 when it got warm and 55 when it let go.
Dave... those pressures are VERY high for those
clearances... I have never had over 70# cold and
25-30 hot.. when pressure is high you are reducing
the flow.. remember pressure is a restriction in
flow... I use the half groove mains and turn higher
rpms... but I do use .003 and .003 on my clearances
on all my junk... I balance out my oil pressure once
I see what it is both hot and cold... but I wouldnt
make a dyno pull or a pass with the pressure you stated
