Thank you for your response. The fuel system has been cleaned. But they did mention high soot. In fact they want me to switch oil. I run Amsoil 15-40, switched when the rig had about 19000 miles. They say go back to Chevron Delo or Mobil 1. They also said to go with the new CJ-4 type oil, rather than the recommended CI-4. I have used Stanadyne with almost every tank since they went to the ultra low sulfer diesel, just mix according to how many gallons I put in, don't over do it I'm sure, not that that should cause a problem. With 66000 miles I have only added maybe 5 qts of oil and change when the computer says I am at between 35 & 40%.
Thanks again for your response and input
Friday, August 7th, 2009 AT 7:48 PM