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#1
18th July 2012, 08:54 AM
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I used to work for an LPG installation centre, cost then was on average £1,500. LPG was also cheap at 36p per litre. We installed Landi MPI systems, which were an excellent bit of kit.
My issues here - while LPG is still cheaper than gasoline, it is NOT cheaper overall. Even at the older 36p per litre cost, couple this with the installation cost, service cost of the system, if you did 12,000 miles per annum, it would still take you well over 6 years to recoup the costs. Double your annual mileage, you're still looking at a lot of time to break even. Then add the periodic LPG cost per litre increase, it becomes clear it's not such a cheap exercise. This is also assuming it never breaks down - needing new LPG injectors etc. Regardless of how good these systems may be, upper cylinder lubrication suffers. Dried out valve guides, valves etc. I've stripped down engines, where the bronze valve guides have actually cracked within the cylinder heads. LPG is cheaper to buy compared to gasoline, but it's not overall cheaper to run or maintain. Some engines, by virtue of their very design consume LPG faster than they slurp gasoline. Is LPG cheaper at the pumps, compared to gasioline? Yes. Is it cheaper long term to run, maintain etc? Definitely not.
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#2
18th July 2012, 09:03 AM
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I accept there are other cost overheads involved, which you've detailed.
What is worth bearing in mind though, is back when LPG was 36p per litre, Petrol was significantly cheaper too. The saving back then in terms of fuel, was maybe 40-45p per litre. With todays pricing, the savings are more in the region of 60 - 65p per litre, and LPG pricing tends to be more stable than its volatile petrol counterpart. So, although LPG increases in price, petrol increases faster - Making the overall proposition more cost effective, plus theres the priceless smug factor of filling the tank for less than £50.....  Installing from new, with the cost of conversion etc, you do have to do the sums and make sure you'll be doing the mileage to make it worth while I totally agree....
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