So, I found myself bored in a meeting at work this morning, and started thinking about tuning boxes.
for £82 I could get this:http://www.ebay.co.u...:X:eRTM:GB:1123
Had it confirmed that it is definately going to do my car, but I am lacking one thing which is stopping me hitting buy! I cant find anyone on the net who has said what the MPG improvement was realistically. I came across one person who said their berlingo gained an extra 100 miles in fuel, but thats all I got!
If I knew what the realistic economy improvement was, I would happily buy it, knowing that I might need to offset the loss for say 1 month, but then after that I am in nothing but profit! but I just cant find these answers!
Has anybody used a box similar to the above on their Ford (preferably mondeo) and can you advise if you got any decent fuel returns.
My current maths is this: so if anyone can correct me...
If I do 650 miles on a £90 tank, that works out as 45 MPG.
If I break that down (by diving the Miles Per Gallon, by 4.546 - the number of litres in a gallon) I get a result of 9.89 Miles per litre.
If I now divide that by the approximate price of 143p (the cost of one litre of fuel) that works out at approximately 14.44 pence per mile.
Now If I take an average of 100 miles gained from a tuning box, that means every tank of fuel would save me £14.44p. On that basis, it would take me circa 5 fillups to pay for the box, and anything after that is a saving , that would probably mean that after Christmas I would be quids in presuming I actually get 100 miles extra per tank!