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Message: <blockquote data-quote="wc9922" data-source="post: 331826" data-attributes="member: 6000">E46F, If I recall correctly, the blue of V-power is a color tracer put into the fuel to make it identifiable from the other grades. Same goes why shell had red and yellow for the other 2 grades. It's basically a dye, so visually they don't mix it up when doing load and unload. However,  I do get what you mean as a consumer when you see the varying depth of the tracer color,it  it does make you think is it the real deal or adultured fuel when u pump. Maybe should ask the tech staff.What u say could be true, if and only if the tracer comes pre-mixed with the V-power additives and added to the fuel at the loading station. Then the color with give an indication of the concentration of the additive injection rates.I suspect the additive injection rates are sometimes of target during operations or the tracer concentration is not consistant for each additive drum .Maybe for shell as long as it's identifiable as blue it's good enough. Cause for them it don't add value to their product if the tracer color shade is consistant all the time. No blue at all then is problem. If however there are  2 seperate injection points : 1 for additive and 1 for tracer at loading stations then the above would not be true as the tracer concentration will be independent of the additive dosing rates.</blockquote>