180k on my car with 3 of the injectors being original and I've owned the car for over 20 years. I replaced the others as they failed. Knock on wood, the last one was the #6 about 6 years ago. Eventually I'll upgrade to the newer style injectors, probably when I replace the wiring harness but until then the old ones have worked fine. I always use the Premium gas so not sure if that has had any impact but no ethanol issues so far.