920 vs. 302 Heads

Well my car is a single fuel setup, just propane.
So I don't have any mileage numbers on what it would do on gasoline.

Just looked up some prices, and it occured the LPG is more like 1/3rd the price of gasoline (!).
Premium Gasoline (98RON) is around €1.68 p/Liter.
Propane (LPG) is around €0,51 p/Liter (used to be few cents higher until recently).

The general concensus here is that gasoline gives some 10-20% better mileage over LPG. But that's mostly based on cars with dual fuel-systems.
But mileage in my car is poor, with around 11mpg overall. That's about 4.7 km per liter.
(Given the things I've done/tried to improve it, it only resulted in a car that's much more fun to drive, but hardly no actual mileage improvements to show for.)

You probably like to do the calculations and conversions to Canadian Dollars yourself here so I won't spoil your fun. :)

I had hopes the 11.3:1cr 360ci would change the mileage for the better, but it's still roughly the same as with the 8.6:1cr 318ci I had before.
The mileage-issue is located in the drivetrain (or me).