LPG Discussion Forum

BMW 645Ci 2dr Auto Coupe BMW 2004 V8, LPG Prins system installed by http://www.biglpg.co.uk/ about 3 years ago. LPG tank takes 82L of LPG, lasts up to 400miles on motorway and 230M in London traffic 300M mixed mode. Black, Red Chateau leather , electrically adjusted sport seats , SAT NAV pro ...

I use usually http://www.petrolprices.com. It only have forecourts & supermarkets there (you have to register there for free to get full access). Price is always spot on there but if garage is out of LPG it show price when garage is runout :/. I also use http://www.FillLPG.co.uk but it is not up to ...

Hi I live in east London. LPG at my local Calor gas center cost 77.7 P but most forecorts(BP 75.9, Shell 74.9) and Sainsbirys (74.9) in surrounding areas are cheaper. Very odd!!!

Hi Pyro
My car is auto. I get 250 -260 miles around town and 350 miles motorway only. I get about 78 ish liters in my tank. Worth converting in you do more than 10k miles and will keep your car for 3 years to pay off conversion plus save a little. That is if price difference will stay at 50-60 p.

to tommo2009,
Do u get that MPG in busy town or motorway etc.? What is the engine size? I get 22+ MPG ish easily on motorway if i dont go over 70 MPH much and there is no traffic jams. But on petrol it is over 30 with above conditions. If i drive about 60 MPH than MPG goin up to 25 ish. But who ...

I had my system retuned checked etc. but mpg did not improved much only a little maybe 1 mpg maybe less.
Well M5 have 5 litre engine right? . My engine is 4.4 I get 15 ish mpg in town so yours will comsume more I guess, so if u get 12-13 in town I would think it is ok. I never had an m5 but my ...

If price of LPG will increase by 10% per month by chrismas it will catch up with petrol.

My local Calor center before 30 sep 59.5, 1 of oct 60.5, 15 of oct 63.9. Price of crude oil gone up to 80$ per barrel. I belive natural gas and LPG prices are linked to the crude price. Only worry is when price of crude will go down price will stay at what it is.

It does not happen every time auto changoer happens. From what I can remember it happened first time with in first two weeks. Fist fillups I did at Sainsburys and Shell. Now I fill up from Calor Gas outlet at Bow in London. When system was connected to laptop mechanic did few change overs via the ...

Ok I have been to the installer and reported the problem with the engine switching off when it is changing to LPG in the morinings.
We hooked up laptop to the socket under the bonnet. He increased fuel pressue to 2.26 (recomended by Prins for my car aparently, it was at 2.23). Then looked at the ...

I think 15 MPG is very good around town but on the motorway 20 MPG is a little disapointing, will take long time to save money I paid for the conversion (2k). Cheaper system was only £300 cheaper so there was no point in it. Oh well what is done is done. This car does 30 MPG on petrol because of the ...

Ok I see what you mean now regarding trip computer. It is definatly showing different on petrol than on LPG. This Sat will take it to the installer and hopefully they will put it right. My mpg around London close to your Saab

I did not notice any pertrol being used. I had car for over 3 weeks done 1200 miles and it did not even used 1/10 of a tank.

Also forgot to mention, I can hear dielsel like sound but much more queter when i switch over to gas. I can only hear it when car is stationary and all windows closed. Is comming out from the engine compartment. Is that normal(pump working etc.)?

Hi
When i start my car in the morining after minute of driving it switches over to LPG if I am moving there is no problem. But if i am stack at traffik light and switch over happens that sometimes engine switches off and I have to start it again. When it starts it goes to LPG right away. Is that ...

Yea. Definatly saves alot of money around town. I had bmw 118D with start stop thingy for a week to drive around a town it did 33 mpg for that week (that is 2L diesel). Now i get 15 mpg on lpg wich is = 30 mpg moneywise.

Trip computer almost correct when I drive in town. But on motorways is way off. I will go to the installer netx saturday and ask him to readjust.
Tnx

Just wanted to add, those figures not taken from the onboard computer but calculated by how many miles i do per full tank of LPG/Petrol. Onboard computer giver 13(LPG) 17.5(Petrol) in town. Motorway 27(LPG) 36 (Petrol)

Hiya
I have recently converted my bmw 645 CI 4.4 V8 to LPG (Prins VSI). MPG around a town (central London with alot of traffic etc) about 15 was 16 on petrol. But only 20 MPG on the motorway, it use to be about 33 MPG on petrol. Is that normal ? I have done roughly 1k miles so far and will take my ...