Did notice a difference on the economy of my D2 and PF D3 on V-Power. Not sure on the diesels, but can't shake the niggling doubt that filling up my car on Asda diesel (it's just round the corner) a lot contributed to the DPF failure (though I'm sure 100k+ miles didn't help either).
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2010 Jag XF 3.0D Portfolio S
I know.. I know..
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