My 600 is in the shop. Driving it the other day and the check engine and check guages light came on. Then the oil pressure suddenly went down in the red and right back up. Pulled over and took a looko under the hood. Checked the oil and found that it was reading four inches aboce the normal line!! It was really runny on the dipstick also. Look under the truck, it was all covered in oil underneath. Obviously has diesel fuel in the oil and is spitting it out underneath out of the breather or over flow. Had it towed, they told me I'm the lucky one, first 600 they had in to service and they can't touch till some special technician comes to look monday!!!