I changed the oil in my 05 and in one day it was just as black as it was before I changed it. Thinking of running for a few days and drain again. Before I add Amsoil.I run Amsoil in my 01 and it stays clean for about4-5k before turning black. Why would the oil in the 05 turn black so fast?

I searched google and could not find what venturi filtering is. A little help

http://www.fleetguard.com/pdfs/product_lit/americas_brochures/LT36043.pdf

Like the others have said, with a diesel the oil is always black looking from the soot deposits. That's why it is so important to use quality media for filters and recommended oil specs, and change intervals.

my buddy has a waste oil heater in his shop that will run on dino,trans fluid,hydraulic fluid or even veggy oil.it was costly to set up but was worth it in the long run.it paid for itself in just a couple of years.

one thing to remember, when oil turns black or discolored, it is doing its job by taking contaminates away from the engine. I wouldnt want to know where all those contaminates would end up if the oil refused to catch it and take it away when you change the oil.to me black is good. its doing its job

I don't let the dealers change my oil, service manager said they just use bulk oil. I am sticking with Delo.

I believe that the turbo is the culprit for the black oil. The seals/bearings on the exhaust side of the turbo allows the exhaust soot to pass into the oil as the oil passes through the turbo and back into the oil pan. If we could put an external oil supply on our Cummins that's just for the turbo then our engine oil would probably be clean/clear until at least 5000 miles and the oil for the turbo would take on the blackness.

I believe that the turbo is the culprit for the black oil. The seals/bearings on the exhaust side of the turbo allows the exhaust soot to pass into the oil as the oil passes through the turbo and back into the oil pan. If we could put an external oil supply on our Cummins that's just for the turbo then our engine oil would probably be clean/clear until at least 5000 miles and the oil for the turbo would take on the blackness.

I believe it's the piston design. The 04.5-07 uses a non reentrant piston, the only time Cummins has ever done this. The 04.5-07 also runs the dirtiest, appearance wise, oil of any Ram (except a stock 6.7, but a deleted 6.7 is cleaner). The reason I say it's the piston is because of all the things that contribute to the in-cylinder EGR and black oil the piston is the only thing left in my motor. I changed the cam, turbo, timing, and 3rd injection even it gone. If you look at the link below you will see that I got my oil CLEAN, and within 1500 miles it was back to black. I don't know when it happened as I was busy and didn't check it until about 1500 miles after 50 miles. At 50 miles it was barely colored with a tinge of gray. http://forum.mopar1973man.com/threads/6744-Little-experiment-with-BLACK-oil?p=66365#post66365

I believe it's the piston design. The 04.5-07 uses a non reentrant piston, the only time Cummins has ever done this. The 04.5-07 also runs the dirtiest, appearance wise, oil of any Ram (except a stock 6.7, but a deleted 6.7 is cleaner). The reason I say it's the piston is because of all the things that contribute to the in-cylinder EGR and black oil the piston is the only thing left in my motor. I changed the cam, turbo, timing, and 3rd injection even it gone. If you look at the link below you will see that I got my oil CLEAN, and within 1500 miles it was back to black. I don't know when it happened as I was busy and didn't check it until about 1500 miles after 50 miles. At 50 miles it was barely colored with a tinge of gray. http://forum.mopar1973man.com/threads/6744-Little-experiment-with-BLACK-oil?p=66365#post66365

This^^^^!!! And in a "stock" engine ('04.5+), the retarded timing and 3rd injection event happening after TDC.