So I bought my truck at around 48,000 miles and read about threads to the fuel filters on how important is it to replace every 15,000 miles. So I had them replaced and was just wondering , should the filters come out this dirty ? It seems like my truck runs better as well. I was getting 10.6 and now on average 12.1 would this really help the fuel economy on the truck ? Sorry for ignorant questions but I am new to the diesel world.
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