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All our diesel fuels are ULSD (Ultra Low Sulphur Diesel) in the UK, (and most of Europe) so using a fuel like Shell V-Power or BP Ultimate, with their additive packages, enhance the fuel and add to lubricity.
BP Ultimate is regular petroleum-based diesel with enhancers for cleaning, added cetane rating and improved lubricity. V-Power Diesel is a blend of regular petroleum-based diesel and synthetic diesel, has the additive benefits, but has a lower unit energy, as it is less dense than regular diesel.
BP Ultimate typically gives better mpg in high performance diesel engines, but experience shows Shell V-Power often shows negative results on consumption, but it is explained by the energy in the fuel. But both premium fuels give enhanced properties for better running and longevity.
Just decide what value you put on a cleaner running engine and longevity. MPG benefits should be of secondary importance, IMO.
HighlandPete
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