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tucsonjwt · 11-27-2010, 08:13 PM

I read that LPG gets 10% less fuel economy when compared to gasoline. So, 8.74 mpg LPG = 9.6 gasoline equivalent MPG. The 3 squares I have owned were all 3/4 ton (2 -454, 1-350) and ranged between 10-12 mpg. In ideal conditions I could get 14 mpg with my 73 C20 454 all highway, but 12-13 was more likely. Cold weather consumes more gas due to choke being on longer. I have known people with 1/2 ton 350s that got 10 mpg. I have also read that tuning a vehicle to run on LPG is different than one running on gasoline. I suspect that most people driving old V8 pickups don't get more than 10 MPG most of the time, unless they keep their trucks in top shape. Just some random thoughts.

11-27-2010, 08:13 PM	#82
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,188	Re: Improve mileage 350 with Quadrajet I read that LPG gets 10% less fuel economy when compared to gasoline. So, 8.74 mpg LPG = 9.6 gasoline equivalent MPG. The 3 squares I have owned were all 3/4 ton (2 -454, 1-350) and ranged between 10-12 mpg. In ideal conditions I could get 14 mpg with my 73 C20 454 all highway, but 12-13 was more likely. Cold weather consumes more gas due to choke being on longer. I have known people with 1/2 ton 350s that got 10 mpg. I have also read that tuning a vehicle to run on LPG is different than one running on gasoline. I suspect that most people driving old V8 pickups don't get more than 10 MPG most of the time, unless they keep their trucks in top shape. Just some random thoughts.