This was sampled and not changed. Truck is on a bypass system, 20 micron primary, 2 micron bypass (amsoil filters and filter head). Silicon is still leaching from upper oil pan reseal about 9000 miles ago. Zero evidence of any dirt in air intake tract. Oil has been in service since October. Also used to tow a 37’ TT since April. Lots of short trips in winter as well. I also installed a high idle switch using PTO wiring connections to eliminate low speed idle time at the time of LOF.
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