It happens because the always new Techs don't read or know how to find out.
Local Fright liner put 38 qts in and didn't drain the old 19 qts out,and lost the seal off the dipstick, and tore up the grill.
Total bill after all was done and said over four states was in excess 2,000.00, and paint damaged by Deming NM place that used a hard brush and Purple Power to clean off oil spray on the back of the coach. Oh and they didn't plug in thee coach when they kept it to change the oil and left on who knows what draining the batteries and causing a groceries in the refrigerator and freezer to ruin.
This was 2012 and no we didn't get even an apology.
Only time I've seen clean oil in a diesel. About 100qts total through the engine during the ordeal. New dipstick assembly new batteries rebuilt grill, and two or was it three oil changes.
We had been through too much already to fool with a Lawyer.
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