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Old 06-11-2014, 12:26 PM   #11 (permalink)
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Join Date: Jun 2014
Location: Portugal
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Anthracite Warrior - '01 Volvo S60 T5
90 day: 21.96 mpg (US)
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Taking 4-cylinder engines as reference, how much is the cost difference between a spark-ignited bi-fuel and a Diesel dual-fuel conversions back there?
I don't think anyone does spark-ignited conversions of diesels because the resulting consumption would render it very fuel-consuming, thus it isn't worth it. Converting a petrol car to run on LPG can go from €1500 upwards, depending on if it's a carburetor or fuel-injected. Diesel to dual fuel is at least €2000, and given current fuel prices, makes it cost-ineffective. An LPG kit on a gasoline car pays for itself in fuel savings in about 25000-30000km, no problem. A diesel conversion in a regular passenger car would take at least 100,000km. That's why they're commonly used in trucks, and not road cars.

Last edited by alexandertorres; 06-11-2014 at 12:27 PM.. Reason: spelling mistake
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