as prices fluctuate, as does mpg, I've always thought that you need to cover at least 20,000 to 25,000 miles before you start saving. Having just worked out using todays prices, petrol at 126.99 & LPG 75p, this still is about right. Not all service stations sell LPG & you still need some petrol to start the car on, it is a dual fuel system.
the amount of fuel used to start up in nominal, i used to fill up with petrol every 3 months
LPG conversions are only good for high mileage cars, unless you can buy one already installed. Installation is around £2k.
if you are looking to keep the car for a long period of time they also make sense.
Dont forget that a lot of people these days will pay a higher price for an LPG equipped car that is of the same age/condition, especially big engined cars.
[QUOTE=CG Trading;3915505]You should also have the system serviced seperately at a specialist to mantain efficient operation of the system. Additional costs here to consider.[quote]
Every 12 months the fuel filter need changing ( about £10) and thats it, modern multi point systems need as much 'maintainence' as a modern fuel injection system
The green argument also falls down as LPG is a bi product of producing petrol!
thus making the whose fuel making process more efficient.
LPG does emit less hydrocarbons than a petrol powered vehicle and you will find that the engine oil is cleaner as LPG contains no detergents (not required as it is a clean fuel)
So you see it is 'greener'
Because of the above, & the fact most seem to have the tank in the boot, I'm not a fan.
Eurostar are still imposing their rules based on the old early systems that had NO safety shut off valves as a result if the lines were severed underbonnet the fuel could potentially continue to flow.
for the last 10 years at least systems have had multiple shut off valves, one on the tank, one on the evaporator and then one inline before the fuel filter, all electromagnetically operated.
Yes you lose space in the boot, that is one of the downsides to LPG.
I have run many cars over hundreds of thousands of miles all with no noticeable power loss but a great saving in my pocket, to me that is the biggest difference.
The discussion keeps coming back to loos of power on the rollers, i'm sorry but that's nothing more than bragging rights, a car that cruises at 80mph on the motorway is using the same power irrespective of LPG or petrol powered.
Modern LPG systems are Mappable and so they can be adjusted at installation to give optimum performance and economy, a friend has an A8 Audi that has LPG, loss of power on the rollers 0.5% loss of economy 1%, savings in fuel over 40%