Loves fuel.

I'm curious on the details of your cummins failing injectors from fueling up at a certain place. Im not defending the big chain stops because i don't use them much. Mostly just curiosity. Back when I was in tech school for diesel , we did testing on fuel quality from a few different places. there were measurable differences in fuel. but it was just btu's and the point it would gel from what I remember . Its enough to cause fuel mileage differences , but at that time we didn't see anything that would cause failure.

Do you have a water separator on your filter? the filter should stop dirt, water can cause problems. About10 years ago some sterling trucks had a problem with the stand pipe being directly under the fill cap on the tank...if the tank was really low, the incoming fuel would splash the standing fuel away from the stand pipe and suck air for a few seconds, that would throw a check engine light.

Good luck with the problem

I've never heard of an injector blowing up before. Even on a common rail engine with 24000psi fuel ive never heard of that. Im not arguing that they might have had shitty fuel, again, my curiosity as a former mechanic is just wondering what could have gotten past a filter or water seperator to cause an injector failure. Was it the fuel side of the injector, or coil side? Lack of lubrication over time can cause failure, again, not trying to argue, im just wondering .