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Chat Area => General Car Chat => Topic started by: tunnie on 03 April 2010, 09:40:59

Title: LPG Running Costs
Post by: tunnie on 03 April 2010, 09:40:59
I've been asked a few times about running costs, so here goes:

Done my first work run on LPG, still need to do a little tweaking with the tank, it needs to be rotated bit further as I only got 68L in 90L tank, I want to get it up to 72/73L

My usual commute on petrol would cost me approx £26/27 each day, doing 150 miles and returning approx 30mpg, which works out at 17.3 pence per mile.

With LPG i am actually driving a further 20 miles to start with, going to a cheaper garage down the road, as its 68.9p a litre at BP around the corner, but 58.9p 10 miles down he road!  :o

Once everything is settled i will be using Asda at High Wycombe were its 54.9p litre.

But even doing 20 miles further, i did 168 miles, and used 31.06L of gas, which works out at 10.8 pence a mile, roughly 25mpg. Which gives me an effective mpg of at least 50 mpg  :D

It cost £18 for the gas, so already saving £9 per day, reckon once i start using the cheapo station on my commute and not doing an extra 20 miles, i should be on target to save £10 per day!

As is considerably less than half price at Asda, should nudge effective 55mpg  :)

Range wise, with 168 miles done, only used just over 1/3 of a tank. So once rotated and more fuel in, i expect range to be approx 350 miles.

One for the gas experts, would reducing gas pressure help mpg? Its running about 1.10 Bar currently.  :y
Title: Re: LPG Running Costs
Post by: TheBoy on 03 April 2010, 09:48:50
Don't adjust pressure, as yours appears to be running perfectly (within the (limited) capabilities of your smaller vapouriser.

The pressure is all based around injector capability, nothing to do with economy/performance (in exactly same way as petrol FPR/petrol injectors)
Title: Re: LPG Running Costs
Post by: tunnie on 03 April 2010, 09:50:45
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Don't adjust pressure, as yours appears to be running perfectly (within the (limited) capabilities of your smaller vapouriser.

The pressure is all based around injector capability, nothing to do with economy/performance (in exactly same way as petrol FPR/petrol injectors)

Its not really missed a beat under normal driving, silky smooth switch over, and pulls well.

Only problem so far, is my hands always smell of gas now  ;D
Title: Re: LPG Running Costs
Post by: TheBoy on 03 April 2010, 09:51:34
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Quote
Don't adjust pressure, as yours appears to be running perfectly (within the (limited) capabilities of your smaller vapouriser.

The pressure is all based around injector capability, nothing to do with economy/performance (in exactly same way as petrol FPR/petrol injectors)

Its not really missed a beat under normal driving, silky smooth switch over, and pulls well.

Only problem so far, is my hands always smell of gas now  ;D
My cars frequently smell of gas - its an age thing....
Title: Re: LPG Running Costs
Post by: Kevin Wood on 03 April 2010, 11:14:32
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Don't adjust pressure, as yours appears to be running perfectly (within the (limited) capabilities of your smaller vapouriser.

The pressure is all based around injector capability, nothing to do with economy/performance (in exactly same way as petrol FPR/petrol injectors)

Indeed. It's just like d!cking about with 4 bar fuel pressure regulators, etc. The ECU will just trim the fuel back to where it was before. If it's running OK, leave it be. :y

Kevin
Title: Re: LPG Running Costs
Post by: Elite Pete on 03 April 2010, 12:40:51
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Don't adjust pressure, as yours appears to be running perfectly (within the (limited) capabilities of your smaller vapouriser.

The pressure is all based around injector capability, nothing to do with economy/performance (in exactly same way as petrol FPR/petrol injectors)

Its not really missed a beat under normal driving, silky smooth switch over, and pulls well.

Only problem so far, is my hands always smell of gas now  ;D
Just wait untill you get a burn :o
Title: Re: LPG Running Costs
Post by: tunnie on 03 April 2010, 12:43:45
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Quote
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Don't adjust pressure, as yours appears to be running perfectly (within the (limited) capabilities of your smaller vapouriser.

The pressure is all based around injector capability, nothing to do with economy/performance (in exactly same way as petrol FPR/petrol injectors)

Its not really missed a beat under normal driving, silky smooth switch over, and pulls well.

Only problem so far, is my hands always smell of gas now  ;D
Just wait untill you get a burn :o

Guessing you get one of those if that plastic neck is not on the nozzle when you release the pressure?
Title: Re: LPG Running Costs
Post by: Lazydocker on 03 April 2010, 18:45:19
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Don't adjust pressure, as yours appears to be running perfectly (within the (limited) capabilities of your smaller vapouriser.

The pressure is all based around injector capability, nothing to do with economy/performance (in exactly same way as petrol FPR/petrol injectors)

Its not really missed a beat under normal driving, silky smooth switch over, and pulls well.

Only problem so far, is my hands always smell of gas now  ;D
Just wait untill you get a burn :o

Guessing you get one of those if that plastic neck is not on the nozzle when you release the pressure?

Once you've had one you'll learn how to release the nozzles without having your hand there  ::) ;)
Title: Re: LPG Running Costs
Post by: TheBoy on 03 April 2010, 20:22:12
or welding gloves in boot, so you don't stink your hands out?
Title: Re: LPG Running Costs
Post by: tunnie on 03 April 2010, 20:25:49
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or welding gloves in boot, so you don't stink your hands out?

Could be an idea, as the smell is quite strong, unless its the pump i have been using  :-/

Going to try BP station next fill up, i know its expensive but interested to see if it pumps faster
Title: Re: LPG Running Costs
Post by: TheBoy on 03 April 2010, 20:31:31
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or welding gloves in boot, so you don't stink your hands out?

Could be an idea, as the smell is quite strong, unless its the pump i have been using  :-/

Going to try BP station next fill up, i know its expensive but interested to see if it pumps faster
You have a multivalve tank, it will never be quick
Title: Re: LPG Running Costs
Post by: tunnie on 03 April 2010, 20:33:16
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or welding gloves in boot, so you don't stink your hands out?

Could be an idea, as the smell is quite strong, unless its the pump i have been using  :-/

Going to try BP station next fill up, i know its expensive but interested to see if it pumps faster
You have a multivalve tank, it will never be quick

Yup, still interested to compare pump speeds though  :)
Title: Re: LPG Running Costs
Post by: feeutfo on 03 April 2010, 20:51:34
smelly hands? never had that.

trigger type pumps, squeeze handle and it clicks off and gas releases then twist the nozel out with the other hand ....no?
Title: Re: LPG Running Costs
Post by: tunnie on 03 April 2010, 20:56:59
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smelly hands? never had that.

trigger type pumps, squeeze handle and it clicks off and gas releases then twist the nozel out with the other hand ....no?

One i have been using so far is this on:

(http://www.petrolpg.com/resimler/kampanya/IthalLPG(T3model)_MK_r_EOJFM.JPG)

Releasing the handle, usual excess gas, goes every ware  :(
Title: Re: LPG Running Costs
Post by: Entwood on 03 April 2010, 21:03:00
Not seen one of them !!

2 most common types shown on this site ..

http://www.lpg-vehicles.co.uk/lpg_suppliers/filling-instructions.htm

:)
Title: Re: LPG Running Costs
Post by: tunnie on 03 April 2010, 21:04:33
above one was closest i could fine, its exactly like the De Visser pictured on your link  :)
Title: Re: LPG Running Costs
Post by: feeutfo on 03 April 2010, 21:08:07
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smelly hands? never had that.

trigger type pumps, squeeze handle and it clicks off and gas releases then twist the nozel out with the other hand ....no?

One i have been using so far is this on:

(http://www.petrolpg.com/resimler/kampanya/IthalLPG(T3model)_MK_r_EOJFM.JPG)

Releasing the handle, usual excess gas, goes every ware  :(

never seen that before either....
Title: Re: LPG Running Costs
Post by: Entwood on 03 April 2010, 21:08:39
Might be my imagination .. but that type "seem" to give a bigger "release" of gas when you turn the handle.

I prefer the "gas guard" ones ...

But the best of all are the "italian cup" ones on the continent ... much easier IMHO ... :)
Title: Re: LPG Running Costs
Post by: Kevin Wood on 03 April 2010, 21:09:54
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Could be an idea, as the smell is quite strong, unless its the pump i have been using  :-/

Going to try BP station next fill up, i know its expensive but interested to see if it pumps faster

The BP on the Farnham bypass is the fastest I've come across. I reckon it fills my tank in about 30 seconds. I then have to queue for ages in the mini-M&S while everyone else does their weekly shop. >:(

Slowest is the Texaco in Fleet - if it's working at all. ::)

Kevin
Title: Re: LPG Running Costs
Post by: tunnie on 03 April 2010, 21:10:38
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Might be my imagination .. but that type "seem" to give a bigger "release" of gas when you turn the handle.

I prefer the "gas guard" ones ...

But the best of all are the "italian cup" ones on the continent ... much easier IMHO ... :)

Going to try BP station and see if its different  :)
Title: Re: LPG Running Costs
Post by: feeutfo on 03 April 2010, 21:14:24
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Might be my imagination .. but that type "seem" to give a bigger "release" of gas when you turn the handle.

I prefer the "gas guard" ones ...

But the best of all are the "italian cup" ones on the continent ... much easier IMHO ... :)
are the fillers all the same fitting between uk and eu? TB had some sort of adapter in his kit which i dont have, he did explane it but i,ve since forgotten...?
Title: Re: LPG Running Costs
Post by: tunnie on 03 April 2010, 21:18:26
Quote
Quote
Might be my imagination .. but that type "seem" to give a bigger "release" of gas when you turn the handle.

I prefer the "gas guard" ones ...

But the best of all are the "italian cup" ones on the continent ... much easier IMHO ... :)
are the fillers all the same fitting between uk and eu? TB had some sort of adapter in his kit which i dont have, he did explane it but i,ve since forgotten...?

Yeah LD mentioned pumps in Europe need an adaptor for our UK fillers
Title: Re: LPG Running Costs
Post by: Entwood on 03 April 2010, 21:23:34
Yup,  you buy an adaptor that screws on to OUR fillers and allows the "italian cup" connector to work ...  I'll look for piccies

EDIT   found one .. :)

(http://img405.imageshack.us/img405/8157/acme3.jpg)

This is what the pump end looks like

(http://www.krausglobal.com/images/lpgNozzle3.jpg)
Title: Re: LPG Running Costs
Post by: tunnie on 03 April 2010, 21:27:30
ACME, is that a wind up  ;D

(http://www.alexross.com/80932-big.jpg)
Title: Re: LPG Running Costs
Post by: TheBoy on 03 April 2010, 21:41:42
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Quote
Might be my imagination .. but that type "seem" to give a bigger "release" of gas when you turn the handle.

I prefer the "gas guard" ones ...

But the best of all are the "italian cup" ones on the continent ... much easier IMHO ... :)

Going to try BP station and see if its different  :)
Teilo said with mutlivalve, best fill rate is going to be about 1.25-1.5 times as long to fill as petrol pump.  IIRC, is your fittings 6mm, rather than 8mm?
Title: Re: LPG Running Costs
Post by: TheBoy on 03 April 2010, 21:42:36
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Quote
Might be my imagination .. but that type "seem" to give a bigger "release" of gas when you turn the handle.

I prefer the "gas guard" ones ...

But the best of all are the "italian cup" ones on the continent ... much easier IMHO ... :)
are the fillers all the same fitting between uk and eu? TB had some sort of adapter in his kit which i dont have, he did explane it but i,ve since forgotten...?
I was supplied 2 fillers, normal (that we fitted) and flush fitting type that you needed to screw the bit in that the pump attaches to.
Title: Re: LPG Running Costs
Post by: tunnie on 03 April 2010, 21:49:47
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Quote
Quote
Might be my imagination .. but that type "seem" to give a bigger "release" of gas when you turn the handle.

I prefer the "gas guard" ones ...

But the best of all are the "italian cup" ones on the continent ... much easier IMHO ... :)

Going to try BP station and see if its different  :)
Teilo said with mutlivalve, best fill rate is going to be about 1.25-1.5 times as long to fill as petrol pump.  IIRC, is your fittings 6mm, rather than 8mm?

Errrr 8mm *i think* we used 8mm connections on the tank
Title: Re: LPG Running Costs
Post by: TheBoy on 03 April 2010, 22:01:23
Kevin Wood can get a fast fill (on pumps that support it) because he has a 4 hole tank and a 5/8th (?) filler pipe ;) ;) ;). You won't get that. Live with it