(quoted from post at 15:47:09 12/23/17) But I have other considerations. I am looking into the future. What I see on the political and economic horizon is not good. I have owned both gas and diesel trucks. The only other fuel you can get by with for a gas burner is naptha type paint thinner. But for my diesels I can burn any type of combustible oil: used motor oil, used ATF, transformer oil, peanut oil, safflower oil, canola oil, soybean oil, etc. I ran my Cummins Dodge for 6 months on nothing but used ATF. At present I dump 3 gallons of filtered used motor oil into every diesel fill-up. Improves fuel mileage, gives more power, makes my engines run quieter, lubricates the pump, and provides over 60 miles of free driving per tankful. The other day I was in a salvage grocery store. I found two 5 gallon containers of new peanut oil at $9 each. That's a steal. I bought both. The proprietor asked me what in the world I was going to do with all that peanut oil. I said I was going to burn it in my tractors and trucks. I put 5 gal. into my Case 995 and 5 gal. into my Dodge truck. Smells so good running down the road or plowing. Plus, there is the evaporation and long term non-use factors. I went with a friend to look at a "91 Cummins Dodge that had been in the woods for years. There was still fuel in the tank. Didn't smell so good, but the motor cranked right away when we put a hot battery on it, and purred like a kitten. A gas burner would have required probably $500-$1000 worth of tune up work, and probably cleaning out the fuel tank. I once bought a MF Perkins 135 that had been parked in the woods for 5 years. Still had fuel in the tank. Put a hot battery on it, cranked it right up and drove it. A gas burner would have required expensive and time consuming work to get it running. So, you can limit your considerations to MPG and initial cost if you want to, but for me, there are far more important factors to consider.