millage per gal
I have a 41 8 cyl with 47k on it I had it rebuilt when it had 45k. comp is 100psi. I have overdrive and on the hiway I only get 12mpg. Tires are at 23 psi. I use 30w oil (NAPA). Vac is at 19 psi off manifold. any suggestions what I can do to get it higher? I hear people are getting 15-18 mpg.