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Does Redex Fuel System Cleaner Actually Make a Difference?

I recently picked up a bottle of Redex fuel system cleaner after seeing it recommended by a few car enthusiasts. After using it for a couple of fill-ups, I noticed a smoother idle and slightly better mileage — or maybe it’s just in my head. Some say it helps remove carbon buildup and keeps injectors clean, but others think it’s just another fuel additive with fancy packaging. I’m wondering if anyone here has seen real, long-term benefits from regular use. Does the Redex fuel system cleaner genuinely improve engine performance, or is it just temporary results? Would love to hear everyone’s honest take before I keep using it.