I have never used injector cleaners. None of our current vehicles ranging from year model 1997 to 2017 have ever shown a need for them. My suki mechanic has never recommended it either. Besides, with fuel standards currently at Euro 4, I believe it should be clean enough.

What I have used is the Revive Turbo Cleaner. While the name may sound like some sort of scam, Central Diesel, a reputable Bosch diesel center, offers it. It is a chemical that is sprayed through the air intake which will then proceed to the turbo, into the engine, and out the exhaust, cleaning everything in its way. I've had it done on three of our cars and can attest to its effectivity, which is especially apparent on older, high mileage vehicles.

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