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 Post subject: MPG
PostPosted: Fri Apr 08, 2011 6:29 am 
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Joined: Mon Feb 21, 2011 7:06 am
Posts: 71
Hi Guys
I have finally got the probs with the LPG on my car sorted
now I need to concentrate on economy.
I am driving a 1993 Shogun 3ltr LWB petro convert and I am wondering
what sort of Milage I should be getting on LPG .I know that it is
like asking how long is a piece of string but some where close
would give me some idea.
Cheers
Sam


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 Post subject: Re: MPG
PostPosted: Fri Apr 08, 2011 6:57 am 
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Location: Durham
Drive on petrol to see what it gets (if you can afford to), and your lpg mpg should be a bit less than that.
Up to 20% less I think but don't quote me :D

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 Post subject: Re: MPG
PostPosted: Fri Apr 08, 2011 7:11 am 
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The prob I have is that I think she is VERY heavy on gas
but until I have some idea of what others are doing I
can't compare .Prior to having the prob sorted
she was doing about 12 mpg which I know is too little
I don't know what she is doing now.
Sam


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 Post subject: Re: MPG
PostPosted: Fri Apr 08, 2011 7:32 am 
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Location: South Wales
As said previously you are going to have to run it on petrol to see what consumption you have. Until then you will have now way of knowing you are likely to achieve.


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 Post subject: Re: MPG
PostPosted: Fri Apr 08, 2011 9:26 am 
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My P38 does 19-20 mpg on petrol and 15-16 mpg on gas. That's the sort of difference you should be looking for but unless you know how much petrol it uses you can't get a feel for how it does on gas.

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 Post subject: Re: MPG
PostPosted: Sun Apr 10, 2011 7:12 pm 
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Hi, I constantly get 20mpg from my 2003 V6 L200 Mitsi (nearly same) on Gas but before I re-conned the injectors it went right down to 11mpg!!!


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 Post subject: Re: MPG
PostPosted: Mon Apr 11, 2011 7:11 pm 
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Thanks for the replies
Fantrider what did you mean when you said reconned the injectors
I am a total newbie with the this
Cheers
Sam


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 Post subject: Re: MPG
PostPosted: Wed Apr 13, 2011 7:18 am 
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Mine is fitted with omvl injectors and had never been touched in 175k! I recently put new springs and rubber O`rings in and set the system up and it gave me nearly a third more range back to how it was when I bought it at 100k.

I had taken mine in to many times to mention to (and I use this term lightly) the local specialist and been charged so many diagnostics I could have replaced the whole system, I then stumbled upon this site and read every page on my system I could and finally the penny dropped just how it all works!!! (not rocket science as I had been led to believe) & then with the help of some great guys (although I cant help thinking that they should get out more :lol: :lol: ! no no, please dont :wink: ) on here its sorted! and the best its ever been!


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 Post subject: Re: MPG
PostPosted: Wed Apr 13, 2011 7:42 am 
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Location: Northants.
One of my family members had the long wheel base V6 Shogun and used to get 8-12 mpg on petrol he said. Can't see how a V6 pulling a huge body would do anymore. All Mitsubishi are thirsty, even the Shogun diesels.


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 Post subject: Re: MPG
PostPosted: Wed Apr 13, 2011 1:25 pm 
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I wont give the sums but travelling back from France yesterday I got 258 miles from 58 litres of lpg with one start on petrol= 20mpg! & constantly getting 250ish per tank
Mitsubishi L200 v6 3.0l 185k on the clock!


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 Post subject: Re: MPG
PostPosted: Wed Apr 13, 2011 1:54 pm 
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Location: Near Liverpool
Dave_G wrote:
your lpg mpg should be a bit less than that.
Up to 20% less I think but don't quote me :D


That's what I thought but, my Kia Sportage used to get on average 18.5-20 per gallon on petrol according to the onboard computer thingy, but now it is reporting 22 per gallon, always used that as a guide only but only time will tell.
More mpg and cheaper! may well be onto a winner here thanks to Andy and the guys at 99Autogas in Widnes they reckon the Rover based 2.7 V6 in the Kia takes very well to the conversion

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 Post subject: Re: MPG
PostPosted: Mon Apr 18, 2011 9:44 am 
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Beeza410 wrote:
More mpg and cheaper! may well be onto a winner here thanks to Andy and the guys at 99Autogas in Widnes they reckon the Rover based 2.7 V6 in the Kia takes very well to the conversion


I may be wrong, although I think one of the experts may ruin youre day on this. As i understand it; the onboard computer thingy works out your mpg based on your petrol injector opening times. The LPG ecu takes these injector signals, and adds a fiddle factor, and then uses these timings for the LPG injectors. If this fiddle factor is too big, too much lpg will be injected, this will result in the car running rich, the cars ECU will recognise this via the lambda sensor and it will reduce the petrol injector times to compensate. As such is will think its using less petrol, hence the improved MPG figures.

This may not actually cause any problems, unless the petrol injector times are reduced too much beyond a certain limit, at which point you will get the car ECU flashing up an error.

Please correct me if I am wrong.


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 Post subject: Re: MPG
PostPosted: Mon Apr 18, 2011 9:55 am 
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I agree with deathbadger.
In a perfect setup, the computer's calculated MPG will stay the same whether you run petrol or gas. But while you are running gas, it will be telling a lie.

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 Post subject: Re: MPG
PostPosted: Mon Apr 18, 2011 12:46 pm 
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Cheers guys. you know how to bring a guy down lol, am going for my first fill-up tomorrow so will work my mileage out from that so if you hear crying from Liverpool you know its me!
Apart from that its running better than it ever did, and it was good before :D

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 Post subject: Re: MPG
PostPosted: Tue Apr 19, 2011 7:42 am 
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Well, even if you loose the 10-20% figure that seems to be pretty average you should still be in the money!


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 Post subject: Re: MPG
PostPosted: Tue Apr 19, 2011 1:34 pm 
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Joined: Wed Mar 30, 2011 11:53 am
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Location: Near Liverpool
Just done my first fill-up since conversion,
45.24 Ltrs @£0.729 per Ltr or 9.951 Gallons @ £4.04 per gallon
164.3 miles.

This gives me 16.51 mpg or 24.47 per mile.

How does this sound to the group?

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 Post subject: Re: MPG
PostPosted: Tue Apr 19, 2011 8:53 pm 
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Joined: Fri Jan 02, 2009 2:30 pm
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Beeza410 wrote:
Just done my first fill-up since conversion,
45.24 Ltrs @£0.729 per Ltr or 9.951 Gallons @ £4.04 per gallon
164.3 miles.

This gives me 16.51 mpg or 24.47 per mile.

How does this sound to the group?


i think your figures should read

£0.729 per ltr £3.31 per gallon


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 Post subject: Re: MPG
PostPosted: Tue Apr 19, 2011 9:18 pm 
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Location: Near Liverpool
i think your figures should read

£0.729 per ltr £3.31 per gallon

Oops

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 Post subject: Re: MPG
PostPosted: Tue Apr 19, 2011 9:36 pm 
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Beeza410 wrote:
Just done my first fill-up since conversion,
45.24 Ltrs @£0.729 per Ltr or 9.951 Gallons @ £4.04 per gallon
164.3 miles.

This gives me 16.51 mpg or 24.47 per mile.

How does this sound to the group?

45.24 litres @ £0.729 ppl = £32.98
£32.98/164.3 miles = 20.07 pence per mile
but you got the mileage correct. If your fuel consumption on petrol was around 20mpg, it's not far out. That's roughly the same as I get from my Range Rover, 20mpg on petrol, 16mpg on LPG.

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'96 Saab 900XS, AEB Leo, sold
'93 Range Rover 4.2 LSE, Lovato LovEco, sold
'98 Ex-Police Range Rover 4.0, Singlepoint AEB Leo, my daily motor
'97 Range Rover 4.0SE, eGas multipoint, a project.....

Proud to be a member of the YCHJCYA2PDTHFH club.


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