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#4
30th July 2018, 07:11 AM
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Cheers Johnny. I was aware of the very basics of its function, but unsure of its effects on fuel economy. I’ll be interested too in what differences you see.
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2010 A8 SE Executive 4.2 FSI D4 2007 Mini Cooper S R56 2008 D3, gone, but not forgotten after 9 years and 90k. 
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