Remapping ECU
I am an OAP and the ever increasing cost of fuel is a concern to me. I have read various articles on ECU re-mapping devices, all of which claim to enhance fuel consumption and performance.
Some guarantee a minimum 20% improvement in fuel consumption. I run a Saab 9-3 Aero diesel 180 saloon which averages about 45mpg. My annual mileage is about 8K. A 20% improvement would mean 54mpg. Are these devices as good as they claim to be?
Also, as they also increase power output, how would this be regarded by my insurance company? I don't want to ask them directly, in case they assume that I am going ahead and load my premium!
Lastly, are there any downsides to engine safety and longevity if I fit one of these devices? I really would appreciate your advice.
Some guarantee a minimum 20% improvement in fuel consumption. I run a Saab 9-3 Aero diesel 180 saloon which averages about 45mpg. My annual mileage is about 8K. A 20% improvement would mean 54mpg. Are these devices as good as they claim to be?
Also, as they also increase power output, how would this be regarded by my insurance company? I don't want to ask them directly, in case they assume that I am going ahead and load my premium!
Lastly, are there any downsides to engine safety and longevity if I fit one of these devices? I really would appreciate your advice.
Asked on 6 November 2011 by GB1943
![](http://images.honestjohn.co.uk/imagecache/file/pad/120x120/media/16477727/537450_458533677529584_1473549666_n.jpg)
Don't do it because the hugely increased insurance cost will be far greater than the saving from improved economy.
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