Jeep remap options

[sawman]

the wifes jeep (3.7 petrol) spends most of its time in town these days, managing to squeeze about 12-15 miles out of a gallon of unleaded. I wonder if a remap could make an improvement to this, i know its never going to be great but struggling another couple of miles to a gallon would be nice, esp if it liberates a bit more power when on the open road.

There seem to be a good number of options according to the 'net, but are there anythings I should be looking out for? are any particular chips likely to be better than another?

[davepoth]

Perhaps considering replacing it with a smaller car might be an option? You could buy a cheap town runaround for the price of a remap.

[sawman]

We don't need another car, esp not a 300 quid snotter, but I hear what you are saying, wifey is quite attached to her jeep, the only things she would happily swap for would involve a trade up in value and so any mpg savings would be wiped out for a year or so.

[stevieturbo]

No amount of remapping is going to make enough of a difference to that style of driving to make it worth it.

Whilst far more expensive, the only thing to reduce fuel costs for that vehicle is an LPG conversion.

But you need to weigh up the installation costs versus any potential savings.

[powerstroke]

sawman said:

the wifes jeep (3.7 petrol) spends most of its time in town these days, managing to squeeze about 12-15 miles out of a gallon of unleaded. I wonder if a remap could make an improvement to this, i know its never going to be great but struggling another couple of miles to a gallon would be nice, esp if it liberates a bit more power when on the open road.

There seem to be a good number of options according to the 'net, but are there anythings I should be looking out for? are any particular chips likely to be better than another?

I would try making sure everything is spot on, tyre presures on the high side K&N filter and if it has a mecanical fan fitting an electric one, thiner oil etc

[anonymous-user]

Perhaps pay for some "economy" driving lessons............ ;-)

[stevieturbo]

Make her walk instead ?

[Nick3point2]

sawman said:

We don't need another car, esp not a 300 quid snotter, but I hear what you are saying, wifey is quite attached to her jeep, the only things she would happily swap for would involve a trade up in value and so any mpg savings would be wiped out for a year or so.

What sort of mileage does she do in a year?

With regard to it not being financially beneficial to change the car because of what the wife would want to trade to, its a case of have your cake and eat it. Even if a £300 remap got you a 10% fuel consumpsion improvement (which is optimistic) then your still only doing 13.2-15.4 mpg, which is going to take a lot of miles to become financially beneficial (I'm on the wrong laptop to check my handy "miles to profit" spreadsheet based on current fuel consumption, proposed spend and improvement from that spend.)

[sawman]

Nick3point2 said:

What sort of mileage does she do in a year?

With regard to it not being financially beneficial to change the car because of what the wife would want to trade to, its a case of have your cake and eat it. Even if a £300 remap got you a 10% fuel consumpsion improvement (which is optimistic) then your still only doing 13.2-15.4 mpg, which is going to take a lot of miles to become financially beneficial (I'm on the wrong laptop to check my handy "miles to profit" spreadsheet based on current fuel consumption, proposed spend and improvement from that spend.)

She probably only does 7k miles a year, I am not sure the math stacks up, Whilst her mileage is pretty small the fuel cost is bearable, If we were to move out of town, then it might become more of an issue, although the 4x4 capability would be more useful at that point.

Thanks for the feedback chaps

[dougie2034]

Hi there,

I have just bought a Jeep Cherokee 3.7 and have been looking into fuel saving options and I'm afraid the LPG option is the best value for money in saving fuel. You say your wife does 7K a year; have a look at my calculations below and see if it's for you:

Taking into consideration the current cost of petrol approx £1.35, current cost of LPG approx £0.70, and a 10% increase in fuel consumption running on LPG(this is the average increase):

7000mls at 15mpg: 7000/15=466.7 gallons of petrol, 466.7x4.55=2123.5 ltrs of petrol, 2123.5x1.35=£2866.73 total cost.

7000mls at 13.5mpg: 7000/13.5=518.5 gallons of LPG, 518.5X4.55=2359.2 ltrs of LPG, 2359.2X0.7=£1651.44 total cost.

As you can see, running for 7000 mls on LPG compared to petrol can save you £1215.29 driving round town. You would save a little less on the motorway but considering you can get an LPG conversion for £1600 (that's for a good reputable one, you can get cheaper), it is well worth considering. Looking on the net, an LPG converted Jeep sells for about £800 more than a standard one so you would recoup half your cost on resale making the decision even more sense.

A remap will give you very little return for your money and although the initial outlay is quite expensive, the LPG pays for itself!

Dougie.

[one eyed mick]

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