How I wish we could post photos on this site! I have some incredible scanning electron micriscope photos of failed injectors at 95,000 miles; totally, completely destroyed. Due to dirt. Current diesel fuel regulations are for 1980 3,000 psi diesel fuel systems in which injector replacements were $28 each. Our current 30,000 psi fuel systems require ultra clean fuel to live. To meet current federal #2 diesel fuel standards, diesel fuel is only filtered to 30 microns when it leaves the refinery. The 7 micron particle is the Duramax fuel system killer. This is why CAT switched from a 20 micron nominal to a 2 micron absolute fuel filter for its Hueiu engines 2 years ago. Their fuel pumps and injectors were not lasting through warranty and the replacement costs were costing CAT millions of dollars until CAT switched to the new ultra fine filtration medium.
Continued....
George Morrison, STLE CLS