Is it possible to change the fuel system in an older vehicle?

Robin Marchione: You could get the engine converted to LPG or Compressed Natural Gas (CNG), but this would cost you (in the UK), about £1,500-2,000 or so, before any grants are taken into account.Such a conversion would reduce the amount of luggage space you have in the boot/trunk, as the gas cylinders need to go somewhere.You would still keep the main fuel tank itself.As an example of what you would save in fuel costs, a litre of unleaded petrol/gas at my local filling station today is £1.42 (or about US$2.27 in your currency). The nearest filling station (about 3 miles away) selling LPG charges £0.77 for a litre of LPG (US$1.23), so if you do a lot of mileage, you would make back the cost of the conversion within 2-3 years or less.Your state/federal government might also offer various grants for such a conversion, which would cut the price even more.You would need to check out availability of LPG or CNG in your local area first, then perhaps check with your local DMV! to see if there are any grants available towards the conversion costs.Could you sell your present vehicle and buy something smaller, even if it slightly older? Or perhaps something that runs on diesel, which is far more economical, even though (here in the UK), it is £1.48 a litre (US$2.37 a litre), as it returns approx 30% more to the gallon than gas does....Show more

May Stands: It can be done but because it's not a common procedure and the companies that manufacture those kinds of parts aren't manufacturing half a million kits a year it would be cheaper to go out and purchase a newer minivan.

Emile Okafor: the following things are possible, though maybe not all practical:LPG, as described by previous replyerCNG: natural gas like what you cook on, but then you would need to have a fueling station close by, or invest in a home filling stationPantone or GEET system: aftermarket system that you add to your engine, and that lets your engine run on a combination ! of any fuel, and water. you need to be a bit technically savy ! to do the conversion. and check about the legalllity in your country. google it and see if it's for you.ethanol: you can make that yourself, and run your car on it. the car also needs some conversion, since it's more aggressive then petrol. and you have to check whether it's legal in your neck of the woods ;-)talking about wood: you can run your car on wood also! It's a hassle, and the conversion let's your car take on a very strange look, but it's possible. and scrap wood is free ;-) here's a website to get you started: http://gas2.org/2008/05/14/a-truck-that-runs-on-co... Check out all the other tips on the bottom of the page as well: fuel efficient driving, and so on ;-)electric: can be very expensive. But there is a possibility to convert your car, and use reconditionned car batteries as the energy storage. the batteries are free of charge since they appear dead.http://www.ehow.com/how_4855050_recondition-car-ba...so as I said, many possibilities, but not always pract! ical ;-)...Show more

Jesusita Dykhoff: Yes, but change it from what to what?

Danette Slotnick: Yes, it is possible to change some fuel systems around. Diesel and gasoline do not mix well at all. The Toyota Hybrid Synergy cars have been out about 9 years now. In our neighborhood, there are at least a dozen of the Toyota Hybrids ready to go. The hybrid cars have undergone many improvements in the 9 years of driving here in Southern Calif. The purchase price has gone up, too. ($30,000. ~ plus taxes). The performance has been improved. The electric motor and gas engine are both working together all the time except when at a stop light. (Silence) Acceleration is remarkable plus quiet, and nearly trouble free. Max speed on a freeway is at least 80 MPH. Up hill mountain climbing is a bit challenging and not really the way to enjoy Hybrid driving. The batteries are holding up well with many chances to recharge a few, none, or all the batteries. The tires and whe! els are only 15 inch diameter with an acceptable ride with proper air p! ressure. The gasoline engine is very economical, but is hard to judge when it cycles on and off all through town and traffic consuming $4.50 per gallon. Gasoline is reportedly delivering 42 MPH from the gas engine. Not bad, at all; but it depends on how you drive!...Show more