Why do you rate BP Ultimate diesel over Shell V-Power for diesels?

I currently run a 2006 Honda Accord 2.2 i-CTDi and have been using Shell V-Power diesel fuel exclusively. I was just wondering what your thoughts are and why you singled out BP Ultimate diesel as your choice for diesels. Are you referring to any research in particular and, if so, could you provide me with the details?

Asked on 21 April 2012 by BD, via email

Answered by Honest John
It's a lot about additives. I rate BP Ultimate diesel as best all-round for fuel economy as well as fuel system treatment. Shell V-Power diesel has the best lubricity for the fuel injection pump but does not achieve quite the same economy. Shell V-Power and its predecessor Shell Optimax are the best petrols because of their fuel system cleaners and high octane. The combination allows engines to run cleanly at lower revs and if this is taken advantage of then better fuel economy will result. Ignore any tests that refute this because the testers were not driving the engines to the best advantage.
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