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47 mpg from a 3.0

on Thu Apr 26, 2018 12:21 pm
Filled up with lpg last night. Paid 55.9p a litre snd put in 48 litres. Mpg was actually 22 but when you factor in cost it is equivalent to 47 on petrol.

Very happy.
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Re: 47 mpg from a 3.0

on Thu Apr 26, 2018 12:24 pm
Haha had be going there.

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Re: 47 mpg from a 3.0

on Thu Apr 26, 2018 12:57 pm
Nice one ...

Are there any cost implications to having the LPG ?

Servicing costs, etc.
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Re: 47 mpg from a 3.0

on Thu Apr 26, 2018 7:07 pm
Yes, lpg system needs servicing. The recomended interval is 12k or 12 months but my system hadn't been done for a while so I got it done and aside from a dirty filter was fine. How often do you get the fuel system on your car serviced. The only servicable part is a filter. Cost is £75.
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Re: 47 mpg from a 3.0

on Thu Apr 26, 2018 8:50 pm
Impretzive!
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Re: 47 mpg from a 3.0

on Fri Apr 27, 2018 11:09 am
Seventy five quid for a filter Shocked Shocked

I bought a shed load of parts for George and the whole lot cost 100 quid.

I bought a new fuel level float, a brass filler elbow (for the filler hose as it was split) a filter, for the vapouriser & new plastic hose to the vapouriser as well as a heap of fastening clips. Fitted myself & checked for leaks at the garage. None found.

The filter is a piece of piss to fit so contact this guy http://tinleytech.co.uk/ (Mick) and save yourself a fortune. It helps to find what flavour of system is fitted, but you should have a booklet with your service book. If not, have a look on the vapouriser and see if there is a make & model number.

I have an air leak at a hose just after the MAF. It causes a shudder upon acceleration on petrol, but on LPG it is worse as the gas is less powerful than petrol so more air makes it struggle. Any time you have a slight hesitation on LPG, look at the rubber trunking from the MAF to the inlet manifold as it is more likely to be the cause.

We used two tanks of LPG to do 420 miles in George. Cost was about 86 quid (small tank). Equivalent petrol would have been about 140 quid Shocked

In summation, it is well worth converting a barge such as a V8 but a smaller motor is negligible.
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Re: 47 mpg from a 3.0

on Fri Apr 27, 2018 11:22 am
The filter isn't £75, the service is. The filter is the only consumable. They did check the condition of the whole system, injection leakage etc.
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Re: 47 mpg from a 3.0

on Fri Apr 27, 2018 1:06 pm
I've managed over 47mpg in a 3.0 turbo...







...diesel.

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Re: 47 mpg from a 3.0

on Fri Apr 27, 2018 3:42 pm
28.8mpg currently in mine, which i think is pretty good (considering it spends most of its time in sport
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Re: 47 mpg from a 3.0

on Fri Apr 27, 2018 8:16 pm
16mpg on lpg, 18/20 on petrol 💥

Sent from Topic'it App
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Re: 47 mpg from a 3.0

on Fri Apr 27, 2018 10:30 pm
Mine does 25 mpg on petrol.
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Re: 47 mpg from a 3.0

on Fri Apr 27, 2018 10:51 pm
Mine does 48mpg on diesel.
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Re: 47 mpg from a 3.0

on Sat Apr 28, 2018 6:56 am
Mmmm.

18-20 average for my commute.

25-28 on a run.

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Re: 47 mpg from a 3.0

on Sat Apr 28, 2018 7:11 am
You clearly enjoy supporting your local refinery...
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Re: 47 mpg from a 3.0

on Sat Apr 28, 2018 10:38 am
mid 20's around town

up to 35 on a run

the Focus petrol does 30's and 45 on a run

My sisters focus diesel has averaged 54 mpg over 8 weeks which is nothing short of astounding.

Teeps, obviously i realise you lose some space for the tank, but is there any real downside to bifuel? i mean is there any discernible difference to driving?
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Re: 47 mpg from a 3.0

on Sat Apr 28, 2018 11:06 am
No real difference in driving do far as I can tell. Perhaps a little less performance but not enough for it to be noticable. I don't put my foot down snd think "This is slow" on lpg.
Biggest downside is that most petrol stations don't sell it. There are 4 in my area which is enough but I have to plan when I am going to fill up.
Other issue is when it was fitted they cut a hole in the side of the car for the filler cap. However when they do this they don't paint/protect the exposed metal around the cut. It's nit visible but water has got in and a bit of rust has formed. I didn't notice it but the body shop doing some work on it did. It's getting sorted but it is a bit anoying as it is entirely avoidable.
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Re: 47 mpg from a 3.0

on Sat Apr 28, 2018 1:42 pm
As Teeps said, finding an LPG filling station can be difficult. Up here, the nearest is Tore, 7 miles from me or Nairn, 16 miles from me. I have two spare tanks so was thinking on refurbishing the best one and finding a place to install it underneath.

There is a little bit of a loss in power. I find if I want immediate acceleration, I switch back to petrol and I get all my ponies giving it the beans. However, I generally live with the losses as the car is so much cheaper to run, especially on longer trips. You rarely need that much overtaking power, but then again George is a heavy beast and takes a lot of prodding to move her lardy arse.

I would trawl the net to find if your particular car is ok to convert as some engines do not like burning LPG. The problem being, it burns hotter and there is no cooling effect of the fuel so you can suffer burnt exhaust valves which is a head off job. Also, if you are going ahead, go for multi point injection because it burns better and less chance of "blowback" which in some cases, knackers the MAF, plastic inlet manifolds, air filters and so on. In worst case scenario's, it can cause an under bonnet fire which is less than desirable Embarassed

If you are serious, call Mick at Tinley Tech http://tinleytech.co.uk/ and ask his advice for your particular car and a cost to have it done. This man is epic and answered all my questions Cool
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Re: 47 mpg from a 3.0

on Sat Apr 28, 2018 2:35 pm
Maybe it's the system but LPG in mine gives the same immediate accelleration as petrol. It's a BRC multipoint injection system. It pulls a little bit less hard at high revs in higher gears.
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Re: 47 mpg from a 3.0

on Sat Apr 28, 2018 2:51 pm
Opposite! Mine pulls well at higher revs. Could be the gearing. I have a 4 speed with an overdrive that drops the revs by 500rpm when going over 50mph.
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