Racing fuel is great marketing placebo for the alter-ego hotrodder who believes his car runs "better" or "has more power" when running it. If your car's not pinging with 98, going to 105 is just throwing your money away. But hey, if it makes YOU feel better...

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280