Yes. Using it since 6 months ago, in various cars, including own and friends' cars too.
Injector cleaner is recommended for newer cars, with milder carbon and gunk formations.
For older cars, and generally for us here in Pakistan, the fuel system treatmwmt , which actually treats the whole fuel system, is recommended.
Like I said, a near immediate difference in the car can be felt, within a km or so.
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