Fuel injection cleaners?

[USAZR1]

I've incorporated the Redline fuel system cleaner into my quarterly fuel system maintenance for the last seven years and am sure it has headed off any problems. My Corvettes weren't daily drivers and besides that,the stuff the oil companies try & pass off as fuel these days doesn't help either. Better to keep injectors from plugging up than waiting on them to do so.
Used correctly,I've never heard of Chevron or Redline cleaners hurting an engine.