How about propane tank range ? Can you go the same number of miles
on a full propane fill-up as you could with full fill-up of the stock
gasoline tank ??
On your Subaru, does the oxygen sensor meter the propane mixture
like it does with the gas mixture ?
From: Richard Gosling [mailto:firstname.lastname@example.org]
Sent: Friday, June 20, 2008 4:11
To: Christian, Skip
Subject: Re: [Mgs] Run the MG on methane
"...Excluding the conversion cost, what's the cost per mile for LPG?
Or, how does LPG compare to gasoline in cost (1/2, 3/4, etc.) ? Also,
what size tank is required to give the equivalent miles as
your original gas tank ?..."
I believe for most cars the mpg with LPG is a bit worse than with
petrol/gasoline - around 80%. I reckon I get about 23mpg (imperial
gallons, not your smaller US ones!) on LPG in my Subaru Legacy, on about
50% town driving 50% highway, not sure what my petrol mileage is as I
never travel far enough on petrol to measure it.
In the UK, LPG is usually around half the price of petrol (currently
55.9p per litre versus 120.9p for petrol at my local garage, so just
under half), largely because of the much reduced tax on LPG - about
75%-80% of the cost of petrol and diesel is tax. It also doesn't seem
to be affected as much by the rapidly rising prices of other oil
On this basis the cost is similar to running a car on petrol at 45-50mpg
- not bad for a four-wheel-drive big estate car!
Richard & Sammy
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