Ways to save on fuel!!??

Submitted: Thursday, May 15, 2008 at 11:18
ThreadID: 57624 Views:2849 Replies:7 FollowUps:6
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On my Wrangler out of pocket expenses; approx $4000 for free-wheeling hubs (lower drag reduced tyre/trans wear requiring new wheels and tyres because of 1/2" increase of PCD) and $2700 for diesel-gas conversion AFTER rebate ($2000 in Vic) and rerouting exh pipe....total $67000 for 1 , 1.5km/l and 2 , approx 25%(?) fuel reduction....can anyone justify that outlay?....I need a spreadsheet to tell me when I would recover my costs and actually start to save.At current prices it seems too much , BUT how much higher will fuel prices go???.......silverback
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Reply By: Member - David P (VIC) - Thursday, May 15, 2008 at 11:19

Thursday, May 15, 2008 at 11:19
meant to add TTFN
AnswerID: 303902

Reply By: MrBitchi (QLD) - Thursday, May 15, 2008 at 11:29

Thursday, May 15, 2008 at 11:29
I've made a couple of assumptions here but plug in your real figures.


Based on: Annual Km:25000
Petrol Consumption 18L/100km
Cost of petrol/Litre:$1.50
Cost of LPG/Litre:$.70
Conversion Cost $6700

Monthly Savings $222
Payback Period 30 months
Annual Savings $2664
Weekly Savings $51

I simply added the cost of your freewheeling hubs into the conversion cost. As you can see, in 2.5 years you're in front.
AnswerID: 303906

Follow Up By: MrBitchi (QLD) - Thursday, May 15, 2008 at 13:42

Thursday, May 15, 2008 at 13:42
Hhmmm, disregard.... (sheesh) Should read more closely. My figures based on a petrol LPG conversion, not a diesel.... :-(
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FollowupID: 570022

Reply By: Member - barry F (NSW) - Thursday, May 15, 2008 at 12:29

Thursday, May 15, 2008 at 12:29
The $6700 would purchase 4466 Litres of fuel @ $1.50 Litre. If the vehicle uses 18 Litres of fuel per 100 Km, the 4666 would be enough fuel to travel 24800 Km. ( & that is just your extra cost ) Your break even point would be rather significant I think
AnswerID: 303909

Follow Up By: Member - barry F (NSW) - Thursday, May 15, 2008 at 13:34

Thursday, May 15, 2008 at 13:34
David, I am no accountant, but think you would calculate your break even point this way. (using the above figures as an example, you would need to insert your actuals)
If you travel 25000 Km per year & your vehicle uses 18 Litres per 100 Km, then you would use 4500 Litres of fuel. If the fuel cost was $1.50 Litre, the your annual cost for fuel would be $6750.00

If by carrying out your modifications & your vehicle now uses 16 Litres of fuel per 100 Km, you would use 4000 Litres of fuel to travel the same 25000 Km @ $1.50 Litre = $6000.00 annual fuel cost.

Your saving on fuel cost therefore represents $750.00 per year. Your capital outlay to achieve this saving was $$6700.00. This outlay divided by your annual savings ($750.00) would mean that it would take 8.9 years to recoup your cost. Thats just the way I see it & would be happy to be corrected.
OK, so I will get back in my kennel now, & wait for the real answer from someone who knows more than me. Good luck.
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FollowupID: 570021

Reply By: The Landy - Thursday, May 15, 2008 at 13:59

Thursday, May 15, 2008 at 13:59
At the risk of sounding flippant; a reduction of 10klm per hour at highway speed can reduce fuel consumption by between 15/20% and costs nothing. Removing roof racks etc when not needed will also yield a benefit.

Very possibly you are doing this and you are looking at additional ways of saving, however its sounds like a lot to spend to achieve fuel savings esepcially on things that may actually be hard to measure the real benefit.
AnswerID: 303920

Follow Up By: Member - David P (VIC) - Thursday, May 15, 2008 at 21:19

Thursday, May 15, 2008 at 21:19
we think alike, too many ponderables, but if I am to do it, best to go straight ahead me thinks. If one only knew what fuel will cost in the future weeks let alone years. On the other hand, other than a TDC chip I've spent nothing on mods and resale would obviously be improved ....cheers Landy....silverback
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FollowupID: 570102

Follow Up By: Waynepd (NSW) - Friday, May 16, 2008 at 10:04

Friday, May 16, 2008 at 10:04
Not flippant at all, I agree with your statement re speed, Landy.

I've tried it for month.... I wasn't serious about it at the time but noticed there is a definite improvement when you travel at 90k top speed instead of 100 or 110k's. Because i was just being mildly curious i didn't really measure how much it saved but i noticed higher trip meter readings between refills.

I usually reset the meter each time i fill up anyway and i do fill up to the top of the fillers each time, so the base measurement is a semi-constant that varies from 106 to 112 lts. I usually use the same bowser so the angle of the vehicle is about the same each time.


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FollowupID: 570162

Reply By: Kiwi & "Mahindra" - Thursday, May 15, 2008 at 15:35

Thursday, May 15, 2008 at 15:35
how our budget would work is this:

if fuel was costing $50 per week...wanting to do that sort of stuff to the car to reduce the cost each week to $30 then for the next however long I would put that $20 away off the mortgage or off the bill that paid all that......put it to good use....

You've inspired me to get my books back out and work them again...been slack lately....

but as for fuel prices...well...I got dibs on the pushies being the next best thing across the simpson!!!LOL!!!!

AnswerID: 303937

Reply By: Member - David P (VIC) - Thursday, May 15, 2008 at 21:09

Thursday, May 15, 2008 at 21:09
To all who replied, thank you. Being a retired type of driver - there being no rush - cruising on the flat no wind 80- 86kph fuel consumption approx 7L/100km. Realistically say 10 (stop/start, some towing) looking to do some big trips in a couple more years it still seems difficult to justify even at current $1.70/L.....hmmmm.....whatcha think doc?....silverback
AnswerID: 304010

Follow Up By: Member -Signman - Friday, May 16, 2008 at 09:22

Friday, May 16, 2008 at 09:22
Mate,
After setting up a spreadsheet and doing all the sums & calculations- I've now worked out THE best way to save fuel....
Leave your vehicle in the garage, and watch the Travel shows on PayTV..
Guaranteed to work !!!!

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FollowupID: 570155

Reply By: Bware (Tweed Valley) - Friday, May 16, 2008 at 09:37

Friday, May 16, 2008 at 09:37
Hi David,

If I was in your position I would first want as accurate a figure as possible for the fuel savings. Factor in that lpg may be cheaper but the km/p/100km is worse etc. The less driving you do per week the less of a saving you get ie if you did less than 100km per week and you were only using 2 litres less fuel, then the saving would be less than 2 x cost of a litre of fuel - $3.40 per week.

If I needed to use a bank loan or extend the mortgage for the upfront costs then it wouldn’t be worth it?

Also, if I upgrade my vehicles every few years would I recover the outlay before selling the vehicle?

From a completely different point of view; if I had the money spare in the bank and it wouldn’t leave me broke or halt the home renovations or the annual holiday etc, I could view the expenditure as part of the cost of the vehicle purchase. Once spent you wont miss it and it may mean I have a few more dollars every week. Although, even looking at it this way, I would like to know I was saving quite a few dollars more per week to really justify it. After all, the initial outlay would buy a lot of fuel for travelling, or accessories, or a longer holiday, or …..

Just my point of view, but I would bugger the idea off. :-))


AnswerID: 304093

Follow Up By: Member - David P (VIC) - Friday, May 16, 2008 at 09:50

Friday, May 16, 2008 at 09:50
Hi Bware, I ask myself of it had been in the option box when buying and it claimed say 35% reduction in fuel use, would I have ticked it? I have the cash for it and I agree if you're getting great economy you tend to do more driving and not worry so much when you pull up at the pump......cheers....silverback
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FollowupID: 570160

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