Fuel injector cleaner for petrol engine?

[3C4M Guy]

Someone recently advised me to use injector cleaner mixed in the petrol tank every few weeks or months. Does anyone have advice whether this is a good idea for a petrol V6? If yes, how often? And is any brand OK or just genuine VW/Audi product? There's a small metal can from Audi for around $40 which is said to be no different to the Holden plastic bottle for around $8. Then there's all the aftermarket ones such as Nulon, Wynn's etc. Thanks.

[gner8r]

i don't think its necessary every week/months i say may be once or twice a year

i normally use liqui moly its around $20 a can but very good stuff

LIQUI-MOLY – AUSTRALIA - PRO-LINE FUEL INJECTION CLEANER