Thanks I didn't know you can get 200 mpg with a Pogue carburetor. My grandfather used a Pogue carburetor and he regularly gets 100+ mpg from army surplus parts he got from U.S. tanks that was used to fight against Rommel's men and it also surprised Gen. Rommel on the Tanks' mileage, which is why he lost.
Later on my grandpa, later found out that the tetraethyl lead was used in the fuel additive and stopped the super mileage and prevented the petroleum cracking to lighter more powerful methane and methanol from gasoline was preventing the Pogue carburetor it reduced the Pogue to regular gas mileage.
Of course, he found a way to removed the additive and with the microfiber oil filter, he did get about 150 mpg. And I can tell you 200 mpg is not possible under normal usage, unless of course you were to drive at a speed below the 55 mph hour.
At the time gasoline prices were cheap so no one had an interest in the Pogue carburetor anyway. Besides you can't manufacture them since the license owner of Pogue carburetor belongs to Standard Oil.
Teddy