Quote:
Originally Posted by jkv45
Some (Shell or Amoco I think) claim to have more detergent in their Premium grade, but I'm pretty sure that's compared to a competitor and not to their other grades.
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Shell states clearly that they include a higher proportion in their premium grades than they do in their regular grades.
Quote:
What makes Shell V-Power NiTRO+ Premium Gasoline different than other Shell grades?
Shell V-Power NiTRO+ contains the highest concentration of the Shell Nitrogen Enriched Cleaning System and cleans up faster than Shell regular. In fact, Shell V-Power now contains seven times the amount of cleaning agents required by federal standards. The new Shell V-Power NiTRO+ formulation contains an innovative combination of two key cleaning agents that work together in harmony to provide the BEST TOTAL engine protection you can get. It provides unbeatable protection against gunk and corrosion, and superior protection against wear.
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source from shell's website