Hi. I've just added a can of this fuel additive bg244 to my 2011 tdci mondeo. I'm getting apparently 52mpg but very bad idling when cold with lots of blue unburnt diesel smoke and poor running for a good few minutes before I can pull away. I'm pretty sure one injector is down till it warms up a little . Also performance isn't great in my opinion I thought the 140 model would go pretty well but it's pretty disappointing. So I'm not expecting miracles but there's plenty of scope for even a little improvement before I do any more serious work and I'll update with results after a 100 miles or so. The car has done 140k but is well maintained oil and filters wise . The additive was £24 on e bay . Not bad if effective but I used to use a delphi recommended additive every service at half the price which I'll go back to if this doesn't impress.