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Previous Questions (Copied from older website)
|Martin Deer||Would it be possible for you to publish the MPG figures you achieved at the conclusion of the 10000 mile London durability test? This would be useful in that we could compare the new engine against the old LTI one. In theory your new engine should give better MPG.|
We are currently at 4000 miles. If you compare MPG between Diesel and LPG, we have achieved an average diesel MPG equivalent for LPG of 32.8MPG during the durability trial.
LPG has less energy per litre (about 40% less), so it’s actual MPG is lower (about 17-18MPG), but because the price of the fuel is lower (£1.189 for Diesel, £0.608 for LPG), we have a saving on fuelcost of 34% compared to a Diesel TX4 (@ 24.4MPG)
Obviously these numbers vary according to the drivestyle and fuel cost. Our best results were 17% higher than what we currently see in MPG. If you can find a cheaper refuelling station, the difference in Fuel savings will further increase.
|Martin Deer||Are you able to give an extimate, using the above mileage figures, on how many miles you would have to drive to recoup the £9800 outlay for the conversion?|
Using those mileage figures, the system would pay for itself at 150.000 miles. If you were doing 30,000 miles a year, the fuel saving would be 1900 pounds per year.
However, the fuel prices used for that comparison do not do the comparison real justice. 1.189 for a liter of Diesel is reasonably cheap, 0.609 for a liter of LPG is quite expensive. We are currently limited in how we can fill up, due to the limitations of the trial. LPG can be found a lot cheaper. For example using 0.54 for a liter of LPG, you would be saving 2500 pounds per year, recouping the costs within 4 years.
A side effect of this project will be a serious uptake of LPG in London. Most LPG suppliers will try to gain that volume, expanding LPG sites and lowering the LPG pricing. Have a look at Birmingham where LPG can be found for as little as 0.45 per liter LPG.
|Martin Deer||I have spoken to the mechanic that services my TX4 and he has raised the following points.
Will you supply a service manual for the engine which gives part numbers of the consumables such as filters, belts, water pump, starter motor, gaskets, torque settings etc? and the recommended mileage to change items such as the timing belt for instance?
Will you provide a list of the error codes for the new engine management system?
If the new ECU goes wrong can he get a replacement?
Will he still be able to read the gearbox error codes and will they stay the same as the original TX4 ones?
Can he source and modify an exhaust locally should it need replacing in the future?
If the radiator needs replacing will a standard TX4 one fit, or will he have to modify it in some way?
During the Warranty period, all engine maintenance will have to be carried out by an approved service center.
A service manual will be available. It will include:
We’ve tried to keep everything as standard as possible.