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      09-24-2012, 04:30 PM   #6
MattUK
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Drives: 2016 M240i Coupe - Estoril
Join Date: Sep 2011
Location: United Kingdom

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2016 BMW M240i  [0.00]
I've never used the Shell one, but I do use the BP.

I did similar tests on the M3 when using the premium fuels, and with the BP Ultimate I do see improvements in mileage from a tank, but overall, when you compare it with the extra 5p+ per litre, and work it out, it balances out to roughly the same in my view.
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