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  1. S

    Oil black as coal after 3000 miles

    I change the oil myself after dealing with quick oil change olaces and found they were not greasing the truck. So I do the oil changes and lube myself. I use Shell Rotella 15w-40w as stated in the manual and also use Lucas oil stabilizer l. I have seen my oil after 3000 miles in the past and...
  2. S

    Oil black as coal after 3000 miles

    Got a 2001 LB7 with 110.000 miles. I have had the injectors changed 3 times and now have another problem hoping someone can tell me what it means. I change my oil every 3000 miles and yesterday checking the oil found it 2 quarts low and as black as coal and as thick as molasses. Drained it...
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