Thanks everyone. The car is now inspected, tagged and titled. It's sitting on 155/80/15 Kumho tires on stock rims. Started on some slightly overdue PMS last night and pumped the tires up to max rated (42psi). Lean burn seems to be working as I when I push on the gas, I can feel a slight pause before the power comes on. I will start to track FE once I start to drive the car regularly.
How do you have that size tire on a VX rim thats only 13 inches? or do you mean 155/80/13?