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I'm in the Netherlands and I think 80% of the amazons and 140/160's run on Liquefied Petroleum Gas, or LPG. Over here it's a mixture of propane and butane I believe, mixing ratio depending on the season.
Over here petrol is about $ 2,00 per liter, LPG is about $ 0,40 ....
LPG has less energy per liter then petrol (regular petrol has about 33, while LPG only has about 25 * 10^9 Joule / m^3. Because of this, a lower milage seems obvious. However, since the LPG is already vapourised in a separte vapouriser, the air/fuel rmixture is excelent and makes up a bit. In practice you'll need about 10-15% more LPG then petrol. The car is a tiny bit slower in the low rpm range though.
cheers, ben
btw1. Keep in mind you will need hardened exhaust seats. LPG has a higher operating temperature, so valve seats wear out quicker. Without hardened seat, you might be able to run 50k miles still though.
btw2. LPG has a lot less harmfull exhaust fumes, environmental-wise, which in my opinion is a small, but extra advantage.
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P131, '65, B20B+M47. P131, '69, B20E+AW71L+LSD. (www.tinustechniek.tk)
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