I prefer to clean my injectors every 100K and KNOW that they are good.

Edit: Yes, it is easier to do the DP every now and then as PM. Me, I prefer to yank the injectors and make sure that they are good. Several times of PM and not being sure that they are good vs 1 yank and knowing it is good. I'll take the latter.

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow