Oil Change Interval on Diesels
03-03-2011, 06:17 AM
#31
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Not sure there is any truth or science to it, but it was my experience. Both the cars that did this to me were DOHC engines.
03-03-2011, 01:16 PM
#32
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Amsoil does not recommend going beyond 5k between changes with ANY oil due to fuel dilution from the dpf system. I change every 10k on my 6.4, but it has dpf and egr delete. Before i deleted all the emissions components the oil seemed way overdue even changing at 5k. Looking forward to installing a dpf/urea delete on a friends 6.7 in the near future, can't wait to see what this motor is capable of!
03-03-2011, 03:56 PM
#33
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I love synthetic oils, but I will say that I switched to it on a couple higher mileage vehicles and immediately developed some small oil leaks. I am not SURE, but a lot of people have acknowledged that the detergents in the Synthetics can cause small leaks to develop in higher mileage vehicles.
Not sure there is any truth or science to it, but it was my experience. Both the cars that did this to me were DOHC engines.
Not sure there is any truth or science to it, but it was my experience. Both the cars that did this to me were DOHC engines.
03-03-2011, 04:00 PM
#34
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Black doesn't mean anything. Oil turns black from heat and a chemical reaction with the metals. My father has a 2000 Excursion 7.3 with roughly 550000 miles on it. He uses AMSOIL 10w-40 with a Bypass Oil System and has only changed the oil 7 times. The ONLY way to tell if oil is good or not is do an oil analysis. Color doesn't mean squadoosh!
03-03-2011, 04:05 PM
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Amsoil does not recommend going beyond 5k between changes with ANY oil due to fuel dilution from the dpf system. I change every 10k on my 6.4, but it has dpf and egr delete. Before i deleted all the emissions components the oil seemed way overdue even changing at 5k. Looking forward to installing a dpf/urea delete on a friends 6.7 in the near future, can't wait to see what this motor is capable of!
03-04-2011, 10:10 AM
#36
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The amsoil rep clued me in on the 5k mile interval with dpf systems intact. He did say that amsoil maintains lubricity longer even with the fuel dilution from the regeneration process.
03-04-2011, 02:30 PM
#37
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Duramax
That's the beautiful thing about the 2011 Duramax. Minimal EGR cause emissions are taken car of with DPF and urea. The smartest thing they did was put a ninth injector in front of the DPF in the exhaust so they don't inject the extra fuel into cylinders during regen...no more diluted oil! I am sure Ford and Dodge will do the same.
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03-05-2011, 04:52 PM
#39
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That's the beautiful thing about the 2011 Duramax. Minimal EGR cause emissions are taken car of with DPF and urea. The smartest thing they did was put a ninth injector in front of the DPF in the exhaust so they don't inject the extra fuel into cylinders during regen...no more diluted oil! I am sure Ford and Dodge will do the same.
03-05-2011, 05:02 PM
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EGR & DPF systems are mostly separate from each other. EGR is used to cool cylinder temps to reduce oxides of nitrogen production. The DPF system with or without urea is is used to reduce particulates in the exhaust. both systems are strictly used to please the tree hugger crowd & both lower your mpg especially the DPF.
