I monitor my injector balance rates all the time....2 stroke brings them back in to +-1, and I have over 112,000 on my truck. 2 Stroke oil or B20 biodiesel, has been shown to be a better injector lubricant, than a lot of the high dollar additives. There is an independent comparison somewhere on this site that compared most of them.
This may be the thread your thinking of. I buy the stuff at wallyworld in the blue jug, I add a 16oz jug each time I fill up no matter how many gallons. Trying to nurse a bad injector, helps till the engine hits full operating temps and then the fuel pump opens up completely and I get the hazy idle or at least that's one of my theory's on the smokey idle. I also figure any diesel made pre 04 wasn't designed to handle the ULSD fuel as it wasn't mandated yet so any lubricity, especially oil based will help all those rubber seals stay soft and pliable rather than drying out and becoming brittle.
A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more!