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Petrol-LPG conversion calculator MkII **UPDATED** now MKIII 

 

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 Post subject: Petrol-LPG conversion calculator MkII **UPDATED** now MKIII
Posted: Mon Jul 04, 2005 11:54 am 
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OK!
Here is an updated utility written for Excel that will calculate how long it will take to pay off an LPG installation, and the cost saving associated with it.

The fields that need filling in are blank, so add in whatever is appropriate for your area, (prices, and KM travelled) and it will calc the rest!

Enjoy!

****UPDATED 5-7-05. See below

 

 

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petrol-V-gas-calculator.xls [17.5 KiB]
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Last edited by 96ghia on Tue Jul 05, 2005 6:33 pm, edited 1 time in total.

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Posted: Mon Jul 04, 2005 12:59 pm 
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Thank you

 

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Posted: Tue Jul 05, 2005 6:32 pm 
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Updated. Now shows how many Km you need to drive until the conversion pays off. Calculated from price of fuels and usage rates

 

 

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petrol-V-gas-calculator.xls [19 KiB]
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Posted: Sun Jul 10, 2005 10:36 am 
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Does the "Savings per litre" need to be in yellow as its not a field that would intentionally be modified...?

Or am I missing something?

Otherwise, great work!

Now it needs a bit more maths, with a variable interest rate of paying off a home loan at 7.23%pa, how much will be lost to compound interest by spending the extra $2000-ish to install LPG and how long will it take to break even?? :) :) :)

j/k!
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Posted: Sun Jul 10, 2005 12:45 pm 
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Bozz wrote:
Does the "Savings per litre" need to be in yellow as its not a field that would intentionally be modified...?

No. Saving per litre is worked out when you put in the cost of the LPG and the cost of the petrol. The difference is what you save per litre.
Bozz wrote:
Now it needs a bit more maths, with a variable interest rate of paying off a home loan at 7.23%pa, how much will be lost to compound interest by spending the extra $2000-ish to install LPG and how long will it take to break even?? :) :) :)
j/k!

Now thats one I'd like to knopw myself!
Next version ;-)
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Posted: Tue Sep 06, 2005 11:26 am 
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Very nice spreadsheet
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Posted: Tue Sep 06, 2005 1:12 pm 
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very good workon the spreadsheet, at least now I have an easy way to convince the missus to change the other car to gas

 

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Posted: Tue Sep 06, 2005 1:17 pm 
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Talk about Thread mining!
I'd almost forgotten all about this!

I've not changed the spreadsheet since, but its pretty well sorted out now!
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Posted: Tue Sep 06, 2005 1:27 pm 
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:)

 

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Posted: Tue Sep 06, 2005 1:33 pm 
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jesus those petrol figures are depressing :? LPG conversion looks a pretty healthy option!

 

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Posted: Tue Sep 06, 2005 2:08 pm 
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Think will be doing mels shortly too! most definately worth it as it'll cost under $1k to install!
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Posted: Tue Sep 06, 2005 2:13 pm 
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How did you manage it for that price??
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Posted: Tue Sep 06, 2005 2:18 pm 
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96ghia wrote:
How did you manage it for that price??


lol, few second hand parts and people u know! labour for install is the most! not too hard to do yourself!
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Posted: Tue Sep 06, 2005 2:20 pm 
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Well, $1000 as opposed to $2500 plus is makes the equations work out much nicer!
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Posted: Tue Sep 06, 2005 2:23 pm 
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yeah, but for $2500 thts brand new parts and high quality bits and tuning and so on .. its a bit of work involved and the mixer/converter new + tank is most of the cost.
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