Hey Guys..Working for a Automotive retailer,Ive sold everything from the Nulon,Interject,Fuelset,OE Holden & Ford fuel cleaner,Ive come to the conclusion The redline oils SI-1 fuel system enhancer is the go,It not only goes up five to six ron,it cleans injectors & lines without dismantling,recommended by most european & american OE dealerships,if its not in the original bottle its in a OE labelled bottle. Ive used it on the quarter mile (ecu set at racing) & once an awhile long trips in the country &i can feel the difference in pulling power & see the difference in Fuel economy..Ive also used the Nulon Prostrength Octane booster together in race situations and driving situtaions ,alone or together thier very effective & a bonus in gaining a lil more power..good luck on the Dyno run