What type of driving:
- what average speed
- steady or start/stop
- hills/no-hills

What is the rolling diameter of your tires?
3.90 rear end
1:1 in high gear

10 mpg is low for 45-55 mph steady driving.

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.