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 Post subject: new data on lpg economy
PostPosted: Sun Nov 16, 2008 2:31 pm 
Intermediate Member

Joined: Fri Feb 03, 2006 12:00 pm
Posts: 904
Location: North Wales
its been a long time coming

but last couple of weeks because of the price differential ...i did some trips on petrol.

when you look at the figures ............its shows lpg economy is quite good.

so dont base any of your calcs on long trips ...........unless that is all you do.
here's some data

on my car rover 420 with sequential omvl dream

and old car sierra 1.8 running groot open loop mixer

lots of running about ..short trips less than 3 miles..ROVER

petrol mpg 19.5 mpg
lpg..............21.5 mpg (first 500 yards of trip cold on petrol )

long trips without stops

petrol.... 41 mpg
lpg ...........31 mpg

running about short trips etc SIERRA

petrol 22-26 mpg
lpg.........22- 26 mpg

long trips without stops

petrol 35 mpg

lpg ........38 mpg

as you can see open loop on old car.....you got some advantages on the long trip mileage ..

doing some calcs on that lot ...........

you will see roughly my avarage with my 420 (that's between the two extremes long runs and short runs )

is 26 mpg lpg

and 30 mpg petrol.

so it works out just about ok ..im quite pleased with that ...since i dont do lots of long runs it works out great.

all the best.markj

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